diff --git a/-/bin/Activate.ps1 b/-/bin/Activate.ps1
new file mode 100644
index 000000000..b49d77ba4
--- /dev/null
+++ b/-/bin/Activate.ps1
@@ -0,0 +1,247 @@
+<#
+.Synopsis
+Activate a Python virtual environment for the current PowerShell session.
+
+.Description
+Pushes the python executable for a virtual environment to the front of the
+$Env:PATH environment variable and sets the prompt to signify that you are
+in a Python virtual environment. Makes use of the command line switches as
+well as the `pyvenv.cfg` file values present in the virtual environment.
+
+.Parameter VenvDir
+Path to the directory that contains the virtual environment to activate. The
+default value for this is the parent of the directory that the Activate.ps1
+script is located within.
+
+.Parameter Prompt
+The prompt prefix to display when this virtual environment is activated. By
+default, this prompt is the name of the virtual environment folder (VenvDir)
+surrounded by parentheses and followed by a single space (ie. '(.venv) ').
+
+.Example
+Activate.ps1
+Activates the Python virtual environment that contains the Activate.ps1 script.
+
+.Example
+Activate.ps1 -Verbose
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and shows extra information about the activation as it executes.
+
+.Example
+Activate.ps1 -VenvDir C:\Users\MyUser\Common\.venv
+Activates the Python virtual environment located in the specified location.
+
+.Example
+Activate.ps1 -Prompt "MyPython"
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and prefixes the current prompt with the specified string (surrounded in
+parentheses) while the virtual environment is active.
+
+.Notes
+On Windows, it may be required to enable this Activate.ps1 script by setting the
+execution policy for the user. You can do this by issuing the following PowerShell
+command:
+
+PS C:\> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
+
+For more information on Execution Policies: 
+https://go.microsoft.com/fwlink/?LinkID=135170
+
+#>
+Param(
+    [Parameter(Mandatory = $false)]
+    [String]
+    $VenvDir,
+    [Parameter(Mandatory = $false)]
+    [String]
+    $Prompt
+)
+
+<# Function declarations --------------------------------------------------- #>
+
+<#
+.Synopsis
+Remove all shell session elements added by the Activate script, including the
+addition of the virtual environment's Python executable from the beginning of
+the PATH variable.
+
+.Parameter NonDestructive
+If present, do not remove this function from the global namespace for the
+session.
+
+#>
+function global:deactivate ([switch]$NonDestructive) {
+    # Revert to original values
+
+    # The prior prompt:
+    if (Test-Path -Path Function:_OLD_VIRTUAL_PROMPT) {
+        Copy-Item -Path Function:_OLD_VIRTUAL_PROMPT -Destination Function:prompt
+        Remove-Item -Path Function:_OLD_VIRTUAL_PROMPT
+    }
+
+    # The prior PYTHONHOME:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PYTHONHOME) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME -Destination Env:PYTHONHOME
+        Remove-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME
+    }
+
+    # The prior PATH:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PATH) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PATH -Destination Env:PATH
+        Remove-Item -Path Env:_OLD_VIRTUAL_PATH
+    }
+
+    # Just remove the VIRTUAL_ENV altogether:
+    if (Test-Path -Path Env:VIRTUAL_ENV) {
+        Remove-Item -Path env:VIRTUAL_ENV
+    }
+
+    # Just remove VIRTUAL_ENV_PROMPT altogether.
+    if (Test-Path -Path Env:VIRTUAL_ENV_PROMPT) {
+        Remove-Item -Path env:VIRTUAL_ENV_PROMPT
+    }
+
+    # Just remove the _PYTHON_VENV_PROMPT_PREFIX altogether:
+    if (Get-Variable -Name "_PYTHON_VENV_PROMPT_PREFIX" -ErrorAction SilentlyContinue) {
+        Remove-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Scope Global -Force
+    }
+
+    # Leave deactivate function in the global namespace if requested:
+    if (-not $NonDestructive) {
+        Remove-Item -Path function:deactivate
+    }
+}
+
+<#
+.Description
+Get-PyVenvConfig parses the values from the pyvenv.cfg file located in the
+given folder, and returns them in a map.
+
+For each line in the pyvenv.cfg file, if that line can be parsed into exactly
+two strings separated by `=` (with any amount of whitespace surrounding the =)
+then it is considered a `key = value` line. The left hand string is the key,
+the right hand is the value.
+
+If the value starts with a `'` or a `"` then the first and last character is
+stripped from the value before being captured.
+
+.Parameter ConfigDir
+Path to the directory that contains the `pyvenv.cfg` file.
+#>
+function Get-PyVenvConfig(
+    [String]
+    $ConfigDir
+) {
+    Write-Verbose "Given ConfigDir=$ConfigDir, obtain values in pyvenv.cfg"
+
+    # Ensure the file exists, and issue a warning if it doesn't (but still allow the function to continue).
+    $pyvenvConfigPath = Join-Path -Resolve -Path $ConfigDir -ChildPath 'pyvenv.cfg' -ErrorAction Continue
+
+    # An empty map will be returned if no config file is found.
+    $pyvenvConfig = @{ }
+
+    if ($pyvenvConfigPath) {
+
+        Write-Verbose "File exists, parse `key = value` lines"
+        $pyvenvConfigContent = Get-Content -Path $pyvenvConfigPath
+
+        $pyvenvConfigContent | ForEach-Object {
+            $keyval = $PSItem -split "\s*=\s*", 2
+            if ($keyval[0] -and $keyval[1]) {
+                $val = $keyval[1]
+
+                # Remove extraneous quotations around a string value.
+                if ("'""".Contains($val.Substring(0, 1))) {
+                    $val = $val.Substring(1, $val.Length - 2)
+                }
+
+                $pyvenvConfig[$keyval[0]] = $val
+                Write-Verbose "Adding Key: '$($keyval[0])'='$val'"
+            }
+        }
+    }
+    return $pyvenvConfig
+}
+
+
+<# Begin Activate script --------------------------------------------------- #>
+
+# Determine the containing directory of this script
+$VenvExecPath = Split-Path -Parent $MyInvocation.MyCommand.Definition
+$VenvExecDir = Get-Item -Path $VenvExecPath
+
+Write-Verbose "Activation script is located in path: '$VenvExecPath'"
+Write-Verbose "VenvExecDir Fullname: '$($VenvExecDir.FullName)"
+Write-Verbose "VenvExecDir Name: '$($VenvExecDir.Name)"
+
+# Set values required in priority: CmdLine, ConfigFile, Default
+# First, get the location of the virtual environment, it might not be
+# VenvExecDir if specified on the command line.
+if ($VenvDir) {
+    Write-Verbose "VenvDir given as parameter, using '$VenvDir' to determine values"
+}
+else {
+    Write-Verbose "VenvDir not given as a parameter, using parent directory name as VenvDir."
+    $VenvDir = $VenvExecDir.Parent.FullName.TrimEnd("\\/")
+    Write-Verbose "VenvDir=$VenvDir"
+}
+
+# Next, read the `pyvenv.cfg` file to determine any required value such
+# as `prompt`.
+$pyvenvCfg = Get-PyVenvConfig -ConfigDir $VenvDir
+
+# Next, set the prompt from the command line, or the config file, or
+# just use the name of the virtual environment folder.
+if ($Prompt) {
+    Write-Verbose "Prompt specified as argument, using '$Prompt'"
+}
+else {
+    Write-Verbose "Prompt not specified as argument to script, checking pyvenv.cfg value"
+    if ($pyvenvCfg -and $pyvenvCfg['prompt']) {
+        Write-Verbose "  Setting based on value in pyvenv.cfg='$($pyvenvCfg['prompt'])'"
+        $Prompt = $pyvenvCfg['prompt'];
+    }
+    else {
+        Write-Verbose "  Setting prompt based on parent's directory's name. (Is the directory name passed to venv module when creating the virtual environment)"
+        Write-Verbose "  Got leaf-name of $VenvDir='$(Split-Path -Path $venvDir -Leaf)'"
+        $Prompt = Split-Path -Path $venvDir -Leaf
+    }
+}
+
+Write-Verbose "Prompt = '$Prompt'"
+Write-Verbose "VenvDir='$VenvDir'"
+
+# Deactivate any currently active virtual environment, but leave the
+# deactivate function in place.
+deactivate -nondestructive
+
+# Now set the environment variable VIRTUAL_ENV, used by many tools to determine
+# that there is an activated venv.
+$env:VIRTUAL_ENV = $VenvDir
+
+if (-not $Env:VIRTUAL_ENV_DISABLE_PROMPT) {
+
+    Write-Verbose "Setting prompt to '$Prompt'"
+
+    # Set the prompt to include the env name
+    # Make sure _OLD_VIRTUAL_PROMPT is global
+    function global:_OLD_VIRTUAL_PROMPT { "" }
+    Copy-Item -Path function:prompt -Destination function:_OLD_VIRTUAL_PROMPT
+    New-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Description "Python virtual environment prompt prefix" -Scope Global -Option ReadOnly -Visibility Public -Value $Prompt
+
+    function global:prompt {
+        Write-Host -NoNewline -ForegroundColor Green "($_PYTHON_VENV_PROMPT_PREFIX) "
+        _OLD_VIRTUAL_PROMPT
+    }
+    $env:VIRTUAL_ENV_PROMPT = $Prompt
+}
+
+# Clear PYTHONHOME
+if (Test-Path -Path Env:PYTHONHOME) {
+    Copy-Item -Path Env:PYTHONHOME -Destination Env:_OLD_VIRTUAL_PYTHONHOME
+    Remove-Item -Path Env:PYTHONHOME
+}
+
+# Add the venv to the PATH
+Copy-Item -Path Env:PATH -Destination Env:_OLD_VIRTUAL_PATH
+$Env:PATH = "$VenvExecDir$([System.IO.Path]::PathSeparator)$Env:PATH"
diff --git a/-/bin/activate b/-/bin/activate
new file mode 100644
index 000000000..6abe3319b
--- /dev/null
+++ b/-/bin/activate
@@ -0,0 +1,69 @@
+# This file must be used with "source bin/activate" *from bash*
+# you cannot run it directly
+
+deactivate () {
+    # reset old environment variables
+    if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then
+        PATH="${_OLD_VIRTUAL_PATH:-}"
+        export PATH
+        unset _OLD_VIRTUAL_PATH
+    fi
+    if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then
+        PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}"
+        export PYTHONHOME
+        unset _OLD_VIRTUAL_PYTHONHOME
+    fi
+
+    # This should detect bash and zsh, which have a hash command that must
+    # be called to get it to forget past commands.  Without forgetting
+    # past commands the $PATH changes we made may not be respected
+    if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
+        hash -r 2> /dev/null
+    fi
+
+    if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then
+        PS1="${_OLD_VIRTUAL_PS1:-}"
+        export PS1
+        unset _OLD_VIRTUAL_PS1
+    fi
+
+    unset VIRTUAL_ENV
+    unset VIRTUAL_ENV_PROMPT
+    if [ ! "${1:-}" = "nondestructive" ] ; then
+    # Self destruct!
+        unset -f deactivate
+    fi
+}
+
+# unset irrelevant variables
+deactivate nondestructive
+
+VIRTUAL_ENV="/Users/raissa/ada/project/solar-system-api/-"
+export VIRTUAL_ENV
+
+_OLD_VIRTUAL_PATH="$PATH"
+PATH="$VIRTUAL_ENV/bin:$PATH"
+export PATH
+
+# unset PYTHONHOME if set
+# this will fail if PYTHONHOME is set to the empty string (which is bad anyway)
+# could use `if (set -u; : $PYTHONHOME) ;` in bash
+if [ -n "${PYTHONHOME:-}" ] ; then
+    _OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}"
+    unset PYTHONHOME
+fi
+
+if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then
+    _OLD_VIRTUAL_PS1="${PS1:-}"
+    PS1="(-) ${PS1:-}"
+    export PS1
+    VIRTUAL_ENV_PROMPT="(-) "
+    export VIRTUAL_ENV_PROMPT
+fi
+
+# This should detect bash and zsh, which have a hash command that must
+# be called to get it to forget past commands.  Without forgetting
+# past commands the $PATH changes we made may not be respected
+if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
+    hash -r 2> /dev/null
+fi
diff --git a/-/bin/activate.csh b/-/bin/activate.csh
new file mode 100644
index 000000000..c501ecd6e
--- /dev/null
+++ b/-/bin/activate.csh
@@ -0,0 +1,26 @@
+# This file must be used with "source bin/activate.csh" *from csh*.
+# You cannot run it directly.
+# Created by Davide Di Blasi <davidedb@gmail.com>.
+# Ported to Python 3.3 venv by Andrew Svetlov <andrew.svetlov@gmail.com>
+
+alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; unsetenv VIRTUAL_ENV_PROMPT; test "\!:*" != "nondestructive" && unalias deactivate'
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+setenv VIRTUAL_ENV "/Users/raissa/ada/project/solar-system-api/-"
+
+set _OLD_VIRTUAL_PATH="$PATH"
+setenv PATH "$VIRTUAL_ENV/bin:$PATH"
+
+
+set _OLD_VIRTUAL_PROMPT="$prompt"
+
+if (! "$?VIRTUAL_ENV_DISABLE_PROMPT") then
+    set prompt = "(-) $prompt"
+    setenv VIRTUAL_ENV_PROMPT "(-) "
+endif
+
+alias pydoc python -m pydoc
+
+rehash
diff --git a/-/bin/activate.fish b/-/bin/activate.fish
new file mode 100644
index 000000000..19776d333
--- /dev/null
+++ b/-/bin/activate.fish
@@ -0,0 +1,69 @@
+# This file must be used with "source <venv>/bin/activate.fish" *from fish*
+# (https://fishshell.com/); you cannot run it directly.
+
+function deactivate  -d "Exit virtual environment and return to normal shell environment"
+    # reset old environment variables
+    if test -n "$_OLD_VIRTUAL_PATH"
+        set -gx PATH $_OLD_VIRTUAL_PATH
+        set -e _OLD_VIRTUAL_PATH
+    end
+    if test -n "$_OLD_VIRTUAL_PYTHONHOME"
+        set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME
+        set -e _OLD_VIRTUAL_PYTHONHOME
+    end
+
+    if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
+        set -e _OLD_FISH_PROMPT_OVERRIDE
+        # prevents error when using nested fish instances (Issue #93858)
+        if functions -q _old_fish_prompt
+            functions -e fish_prompt
+            functions -c _old_fish_prompt fish_prompt
+            functions -e _old_fish_prompt
+        end
+    end
+
+    set -e VIRTUAL_ENV
+    set -e VIRTUAL_ENV_PROMPT
+    if test "$argv[1]" != "nondestructive"
+        # Self-destruct!
+        functions -e deactivate
+    end
+end
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+set -gx VIRTUAL_ENV "/Users/raissa/ada/project/solar-system-api/-"
+
+set -gx _OLD_VIRTUAL_PATH $PATH
+set -gx PATH "$VIRTUAL_ENV/bin" $PATH
+
+# Unset PYTHONHOME if set.
+if set -q PYTHONHOME
+    set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
+    set -e PYTHONHOME
+end
+
+if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
+    # fish uses a function instead of an env var to generate the prompt.
+
+    # Save the current fish_prompt function as the function _old_fish_prompt.
+    functions -c fish_prompt _old_fish_prompt
+
+    # With the original prompt function renamed, we can override with our own.
+    function fish_prompt
+        # Save the return status of the last command.
+        set -l old_status $status
+
+        # Output the venv prompt; color taken from the blue of the Python logo.
+        printf "%s%s%s" (set_color 4B8BBE) "(-) " (set_color normal)
+
+        # Restore the return status of the previous command.
+        echo "exit $old_status" | .
+        # Output the original/"old" prompt.
+        _old_fish_prompt
+    end
+
+    set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
+    set -gx VIRTUAL_ENV_PROMPT "(-) "
+end
diff --git a/-/bin/pip b/-/bin/pip
new file mode 100755
index 000000000..c84dc4257
--- /dev/null
+++ b/-/bin/pip
@@ -0,0 +1,8 @@
+#!/Users/raissa/ada/project/solar-system-api/-/bin/python3.10
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/-/bin/pip3 b/-/bin/pip3
new file mode 100755
index 000000000..c84dc4257
--- /dev/null
+++ b/-/bin/pip3
@@ -0,0 +1,8 @@
+#!/Users/raissa/ada/project/solar-system-api/-/bin/python3.10
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/-/bin/pip3.10 b/-/bin/pip3.10
new file mode 100755
index 000000000..c84dc4257
--- /dev/null
+++ b/-/bin/pip3.10
@@ -0,0 +1,8 @@
+#!/Users/raissa/ada/project/solar-system-api/-/bin/python3.10
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/-/bin/python b/-/bin/python
new file mode 120000
index 000000000..c3cc99197
--- /dev/null
+++ b/-/bin/python
@@ -0,0 +1 @@
+python3.10
\ No newline at end of file
diff --git a/-/bin/python3 b/-/bin/python3
new file mode 120000
index 000000000..c3cc99197
--- /dev/null
+++ b/-/bin/python3
@@ -0,0 +1 @@
+python3.10
\ No newline at end of file
diff --git a/-/bin/python3.10 b/-/bin/python3.10
new file mode 120000
index 000000000..76f29a695
--- /dev/null
+++ b/-/bin/python3.10
@@ -0,0 +1 @@
+/opt/homebrew/opt/python@3.10/bin/python3.10
\ No newline at end of file
diff --git a/-/pyvenv.cfg b/-/pyvenv.cfg
new file mode 100644
index 000000000..4ae9770f4
--- /dev/null
+++ b/-/pyvenv.cfg
@@ -0,0 +1,3 @@
+home = /opt/homebrew/opt/python@3.10/bin
+include-system-site-packages = false
+version = 3.10.9
diff --git a/app/__init__.py b/app/__init__.py
index 70b4cabfe..a62bfed4b 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -1,7 +1,36 @@
 from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from flask_migrate import Migrate
+from dotenv import load_dotenv
+import os
 
 
+db = SQLAlchemy()
+migrate = Migrate()
+load_dotenv()
+
 def create_app(test_config=None):
     app = Flask(__name__)
 
+    if not test_config:
+        app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+        app.config['SQLALCHEMY_DATABASE_URI'] = os.environ.get(
+            "SQLALCHEMY_DATABASE_URI")
+        
+    else:
+        app.config["TESTING"] = True
+        app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
+        app.config["SQLALCHEMY_DATABASE_URI"] = os.environ.get(
+            "SQLALCHEMY_TEST_DATABASE_URI")
+
+    db.init_app(app)
+    migrate.init_app(app, db)
+
+
+    from app.models.planet import Planet  
+    
+    from .routes import planet_bp
+    app.register_blueprint(planet_bp)
+
     return app
+
diff --git a/app/models/__init__.py b/app/models/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/app/models/planet.py b/app/models/planet.py
new file mode 100644
index 000000000..5512500b7
--- /dev/null
+++ b/app/models/planet.py
@@ -0,0 +1,24 @@
+from app import db
+
+class Planet(db.Model):
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    name = db.Column(db.String)
+    description = db.Column(db.String)
+    diameter= db.Column(db.Float)
+    __tablename__ = "Planets"
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "name": self.name,
+            "description": self.description,
+            "diameter": self.diameter
+        }
+    
+    @classmethod
+    def from_dict(cls, planet_data):
+        return cls(
+            name=planet_data['name'],
+            description=planet_data['description'],
+            diameter=planet_data['diameter']
+        )
\ No newline at end of file
diff --git a/app/routes.py b/app/routes.py
index 8e9dfe684..f8a14a4d1 100644
--- a/app/routes.py
+++ b/app/routes.py
@@ -1,2 +1,118 @@
-from flask import Blueprint
+from app import db
+from app.models.planet import Planet
+from flask import Blueprint, jsonify, make_response, request, abort
+from sqlalchemy.exc import DataError
 
+planet_bp = Blueprint("planet", __name__, url_prefix="/planets")
+
+def validate_model(cls, model_id):
+    try:
+        model_id = int(model_id)
+    except:
+        message = f"{cls.__name__} {model_id} invalid"
+        abort(make_response({"message": message}, 400))
+
+    model = cls.query.get(model_id)
+
+    if not model:
+        message = f"{cls.__name__} {model_id} not found"
+        abort(make_response({"message": message}, 404))
+
+    return model
+
+@planet_bp.route("", methods=["POST"])
+def create_planet():
+    request_body = request.get_json()
+
+    try:
+        new_planet = Planet.from_dict(request_body)
+        db.session.add(new_planet)
+        db.session.commit()
+
+        message = f"Planet {new_planet.name} successfully created"
+        return make_response(jsonify(message)), 201
+    except KeyError as e:
+        expected_keys = ["name", "description", "diameter"]
+        missing_keys = [key for key in expected_keys if key not in request_body]
+
+        message = 'missing required values'
+        error_dict = {"message": message, "missing_values": missing_keys}
+
+        abort(make_response(error_dict, 400))
+    except (TypeError, DataError) as e:
+        error_dict = {
+            "message": "Invalid request body",
+            "error": str(e)
+            }
+        abort(make_response(jsonify(error_dict), 400))
+
+@planet_bp.route("", methods=['GET'])
+def get_all_planets():
+    name_query = request.args.get("name")
+    if name_query:
+        planets = Planet.query.filter_by(name=name_query)
+    else:
+        planets = Planet.query.all()
+
+    planet_list = [planet.to_dict() for planet in planets]
+    return make_response(jsonify(planet_list)), 200
+
+@planet_bp.route("/<planet_id>", methods=['GET'])
+def get_planet(planet_id):
+    planet = validate_model(Planet, planet_id)
+    return jsonify(planet.to_dict()), 200 
+
+@planet_bp.route("/<planet_id>", methods=["PUT"])
+def replace_planet(planet_id):
+    planet = validate_model(Planet, planet_id)
+    request_body = request.get_json()
+
+    try: 
+        planet.name = request_body["name"]
+        planet.description = request_body["description"]
+        planet.diameter = request_body["diameter"]
+        db.session.commit()
+        message = f"Planet #{planet.id} successfully updated"
+        return make_response(jsonify(message)), 200
+    except KeyError as e:
+        expected_keys = ["name", "description", "diameter"]
+        missing_keys = [key for key in expected_keys if key not in request_body]
+
+        message = 'missing required values'
+        error_dict = {"message": message, "missing_values": missing_keys}
+
+        abort(make_response(error_dict, 400))
+    except (TypeError, DataError) as e:
+        error_dict = {
+            "message": "Invalid request body",
+            "error": str(e)
+            }
+        abort(make_response(jsonify(error_dict), 400))
+
+@planet_bp.route("/<planet_id>", methods=["PATCH"])
+def update_planet(planet_id):
+    planet = validate_model(Planet, planet_id)
+    request_body = request.get_json()
+
+    try:
+        for key in request_body:
+            setattr(planet, key, request_body[key])
+        db.session.commit()
+        message = f"Planet #{planet.id} successfully updated"
+        return make_response(jsonify(message)), 200
+    except (TypeError, KeyError, DataError) as e:
+        error_dict = {
+            "message": "Invalid request body",
+            "error": str(e)
+            }
+        abort(make_response(jsonify(error_dict), 400))
+
+@planet_bp.route("/<planet_id>", methods=['DELETE'])
+def delete_planet(planet_id):
+    planet = validate_model(Planet, planet_id)
+    
+    db.session.delete(planet)
+    db.session.commit()
+    
+    message = f"Planet #{planet.id} {planet.name} successfully deleted" 
+    return make_response(jsonify(message)), 200
\ No newline at end of file
diff --git a/migrations/README b/migrations/README
new file mode 100644
index 000000000..0e0484415
--- /dev/null
+++ b/migrations/README
@@ -0,0 +1 @@
+Single-database configuration for Flask.
diff --git a/migrations/alembic.ini b/migrations/alembic.ini
new file mode 100644
index 000000000..ec9d45c26
--- /dev/null
+++ b/migrations/alembic.ini
@@ -0,0 +1,50 @@
+# A generic, single database configuration.
+
+[alembic]
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic,flask_migrate
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[logger_flask_migrate]
+level = INFO
+handlers =
+qualname = flask_migrate
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S
diff --git a/migrations/env.py b/migrations/env.py
new file mode 100644
index 000000000..68feded2a
--- /dev/null
+++ b/migrations/env.py
@@ -0,0 +1,91 @@
+from __future__ import with_statement
+
+import logging
+from logging.config import fileConfig
+
+from flask import current_app
+
+from alembic import context
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+logger = logging.getLogger('alembic.env')
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+config.set_main_option(
+    'sqlalchemy.url',
+    str(current_app.extensions['migrate'].db.get_engine().url).replace(
+        '%', '%%'))
+target_metadata = current_app.extensions['migrate'].db.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url, target_metadata=target_metadata, literal_binds=True
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+
+    # this callback is used to prevent an auto-migration from being generated
+    # when there are no changes to the schema
+    # reference: http://alembic.zzzcomputing.com/en/latest/cookbook.html
+    def process_revision_directives(context, revision, directives):
+        if getattr(config.cmd_opts, 'autogenerate', False):
+            script = directives[0]
+            if script.upgrade_ops.is_empty():
+                directives[:] = []
+                logger.info('No changes in schema detected.')
+
+    connectable = current_app.extensions['migrate'].db.get_engine()
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            process_revision_directives=process_revision_directives,
+            **current_app.extensions['migrate'].configure_args
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()
diff --git a/migrations/script.py.mako b/migrations/script.py.mako
new file mode 100644
index 000000000..2c0156303
--- /dev/null
+++ b/migrations/script.py.mako
@@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}
diff --git a/migrations/versions/0a6971d40876_create_planet_table.py b/migrations/versions/0a6971d40876_create_planet_table.py
new file mode 100644
index 000000000..49016055b
--- /dev/null
+++ b/migrations/versions/0a6971d40876_create_planet_table.py
@@ -0,0 +1,34 @@
+"""Create planet table
+
+Revision ID: 0a6971d40876
+Revises: 
+Create Date: 2023-04-29 16:53:27.534489
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '0a6971d40876'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('Planets',
+    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+    sa.Column('name', sa.String(), nullable=True),
+    sa.Column('description', sa.String(), nullable=True),
+    sa.Column('diameter', sa.Float(), nullable=True),
+    sa.PrimaryKeyConstraint('id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('Planets')
+    # ### end Alembic commands ###
diff --git a/requirements.txt b/requirements.txt
index ae59e7b55..966d770b4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,14 +4,19 @@ blinker==1.4
 certifi==2020.12.5
 chardet==4.0.0
 click==7.1.2
+coverage==7.2.3
+exceptiongroup==1.1.1
 Flask==1.1.2
 Flask-Migrate==2.6.0
 Flask-SQLAlchemy==2.4.4
 idna==2.10
+iniconfig==2.0.0
 itsdangerous==1.1.0
 Jinja2==2.11.3
 Mako==1.1.4
 MarkupSafe==1.1.1
+packaging==23.1
+pluggy==1.0.0
 psycopg2-binary==2.9.5
 pycodestyle==2.6.0
 pytest==7.3.1
@@ -23,5 +28,6 @@ requests==2.25.1
 six==1.15.0
 SQLAlchemy==1.3.23
 toml==0.10.2
+tomli==2.0.1
 urllib3==1.26.4
 Werkzeug==1.0.1
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 000000000..c8c5fab8d
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,39 @@
+import pytest
+from app import create_app
+from app import db
+from flask.signals import request_finished
+from app.models.planet import Planet
+
+@pytest.fixture
+def app():
+    app = create_app({"TESTING": True})
+
+    @request_finished.connect_via(app)
+    def expire_session(sender, response, **extra):
+        db.session.remove()
+
+    with app.app_context():
+        db.create_all()
+        yield app
+
+    with app.app_context():
+        db.drop_all()
+
+@pytest.fixture
+def client(app):
+    return app.test_client()
+
+@pytest.fixture
+def two_saved_planets(app):
+    # Arrange
+    mercury_planet = Planet(name="Mercury",
+                      description="smallest planet",
+                      diameter=3031.9)
+    jupter_planet = Planet(name="Jupiter",
+                      description="biggest planet",
+                      diameter="86881")
+
+    db.session.add_all([mercury_planet, jupter_planet])
+    db.session.commit()
+
+
diff --git a/tests/test_routes.py b/tests/test_routes.py
new file mode 100644
index 000000000..1da4a9c89
--- /dev/null
+++ b/tests/test_routes.py
@@ -0,0 +1,592 @@
+import pytest
+from werkzeug.exceptions import HTTPException
+from app.routes import validate_model
+from app.models.planet import Planet
+
+def test_get_all_planets_with_no_records(client):
+    # Act
+    response = client.get("/planets")
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == []
+
+def test_get_all_planets_with_two_records(client, two_saved_planets):
+    # Act
+    response = client.get("/planets")
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert len(response_body) == 2
+    assert response_body[0] == {
+        "id": 1,
+        "name": "Mercury",
+        "description": "smallest planet",
+        "diameter": 3031.9
+    }
+    assert response_body[1] == {
+        "id": 2,
+        "name": "Jupiter",
+        "description": "biggest planet",
+        "diameter": 86881
+    }
+    
+def test_get_all_planets_with_title_query_matching_none(client, two_saved_planets):
+    # Act
+    data = {'name': 'Dog'}
+    response = client.get("/planets", query_string = data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == []
+
+def test_get_all_planets_with_title_query_matching_one(client, two_saved_planets):
+    # Act
+    data = {'name': 'Mercury'}
+    response = client.get("/planets", query_string = data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert len(response_body) == 1
+    assert response_body[0] == {
+        "id": 1,
+        "name": "Mercury",
+        "description": "smallest planet",
+        "diameter": 3031.9
+    }
+
+def test_get_one_planet_missing_record(client, two_saved_planets):
+    # Act
+    response = client.get("/planets/3")
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 404
+    assert response_body == {"message": "Planet 3 not found"}
+
+def test_get_one_planet_invalid_id(client, two_saved_planets):
+    # Act
+    response = client.get("/planets/earth")
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body == {"message":"Planet earth invalid"}
+
+def test_get_one_planet(client, two_saved_planets):
+    # Act
+    response = client.get("/planets/1")
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == {
+        "id": 1,
+        "name": "Mercury",
+        "description": "smallest planet",
+        "diameter": 3031.9
+    }
+
+def test_create_one_planet(client):
+    # Act
+    response = client.post("/planets", json={
+        "name": "Pluto",
+        "description": "dwarf planet",
+        "diameter": 1473
+    })
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 201
+    assert response_body == "Planet Pluto successfully created"
+
+def test_create_one_planet_no_name(client):
+    # Arrange
+    test_data = {"description": "The Best!", "diameter": 1000}
+    response = client.post("/planets", json=test_data)
+    response_body = response.get_json()
+
+    assert response.status_code == 400
+    assert response_body["message"] == 'missing required values'
+    assert response_body["missing_values"] == ['name']
+
+def test_create_one_planet_no_description(client):
+    # Arrange
+    test_data = {"name": "New planet", "diameter": 1000}
+    response = client.post("/planets", json=test_data)
+    response_body = response.get_json()
+
+    # Act & Assert
+    assert response.status_code == 400
+    assert response_body["message"] == 'missing required values'
+    assert response_body["missing_values"] == ['description']
+
+def test_create_one_planet_no_diameter(client):
+    # Arrange
+    test_data = {"name": "New planet", "description": "The Best!"}
+    response = client.post("/planets", json=test_data)
+    response_body = response.get_json()
+
+    # Act & Assert
+    assert response.status_code == 400
+    assert response_body["message"] == 'missing required values'
+    assert response_body["missing_values"] == ['diameter']
+
+def test_create_one_planet_no_name_and_no_description(client):
+    # Arrange
+    test_data = {"diameter": 1000}
+    response = client.post("/planets", json=test_data)
+    response_body = response.get_json()
+
+    assert response.status_code == 400
+    assert response_body["message"] == 'missing required values'
+    assert response_body["missing_values"] == ['name', 'description']
+
+def test_create_one_planet_no_name_and_no_diameter(client):
+    # Arrange
+    test_data = {"description": "The Best!"}
+    response = client.post("/planets", json=test_data)
+    response_body = response.get_json()
+
+    assert response.status_code == 400
+    assert response_body["message"] == 'missing required values'
+    assert response_body["missing_values"] == ['name', 'diameter']
+
+def test_create_one_planet_no_description_and_no_diameter(client):
+    # Arrange
+    test_data = {"name": "New planet"}
+    response = client.post("/planets", json=test_data)
+    response_body = response.get_json()
+
+    assert response.status_code == 400
+    assert response_body["message"] == 'missing required values'
+    assert response_body["missing_values"] == ['description', 'diameter']
+
+def test_create_one_planet_with_extra_keys(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "extra": "some stuff",
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": 1000,
+        "another": "last value"
+    }
+
+    # Act
+    response = client.post("/planets", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 201
+    assert response_body == "Planet New planet successfully created"
+
+def test_create_one_planet_with_invalid_diameter(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": "dog"
+    }
+
+    # Act
+    response = client.post("/planets", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body["error"]
+
+def test_replace_planet(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.put("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 successfully updated"
+
+def test_replace_planet_with_extra_keys(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "extra": "some stuff",
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": 1000,
+        "another": "last value"
+    }
+
+    # Act
+    response = client.put("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 successfully updated"
+
+def test_replace_planet_missing_record(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.put("/planets/3", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 404
+    assert response_body == {"message": "Planet 3 not found"}
+
+def test_replace_planet_no_name(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "description": "The Best!",
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.put("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body["message"] == "missing required values"
+    assert response_body["missing_values"] == ["name"]
+
+def test_replace_planet_no_description(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.put("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body["message"] == "missing required values"
+    assert response_body["missing_values"] == ["description"]
+
+def test_replace_planet_no_diameter(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!"
+    }
+
+    # Act
+    response = client.put("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body["message"] == "missing required values"
+    assert response_body["missing_values"] == ["diameter"]
+
+def test_replace_planet_no_name_no_description(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.put("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body["message"] == "missing required values"
+    assert response_body["missing_values"] == ["name", "description"]
+
+def test_replace_planet_no_name_no_diameter(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "description": "The Best!"
+    }
+
+    # Act
+    response = client.put("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body["message"] == "missing required values"
+    assert response_body["missing_values"] == ["name", "diameter"]
+
+def test_replace_planet_no_description_no_diameter(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet"
+    }
+
+    # Act
+    response = client.put("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body["message"] == "missing required values"
+    assert response_body["missing_values"] == ["description", "diameter"]
+
+def test_replace_planet_invalid_id(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.put("/planets/dog", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body == {"message": "Planet dog invalid"}
+
+def test_replace_planet_invalid_diameter(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": "dog"
+    }
+
+    # Act
+    response = client.put("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body['error']
+
+def test_update_planet_name_only(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet"
+    }
+
+    # Act
+    response = client.patch("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 successfully updated"
+
+def test_update_planet_description_only(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "description": "The Best!"
+    }
+
+    # Act
+    response = client.patch("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 successfully updated"
+
+def test_update_planet_diameter_only(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.patch("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 successfully updated"
+
+def test_update_planet_name_and_description(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!"
+    }
+
+    # Act
+    response = client.patch("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 successfully updated"
+
+def test_update_planet_name_and_diameter(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.patch("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 successfully updated"
+
+def test_update_planet_description_and_diameter(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "description": "The Best!",
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.patch("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 successfully updated"
+
+def test_update_planet_name_description_and_diameter(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.patch("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 successfully updated"
+
+def test_update_planet_with_extra_keys(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": 1000,
+        "another": "last value"
+    }
+
+    # Act
+    response = client.patch("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 successfully updated"
+
+def test_update_planet_missing_record(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.patch("/planets/3", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 404
+    assert response_body == {"message": "Planet 3 not found"}
+
+def test_update_planet_invalid_id(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": 1000
+    }
+
+    # Act
+    response = client.patch("/planets/dog", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body == {"message": "Planet dog invalid"}
+
+def test_update_planet_invalid_diameter(client, two_saved_planets):
+    # Arrange
+    test_data = {
+        "name": "New planet",
+        "description": "The Best!",
+        "diameter": "dog"
+    }
+
+    # Act
+    response = client.patch("/planets/1", json=test_data)
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body["message"] == "Invalid request body"
+    assert response_body["error"]
+
+def test_delete_planet(client, two_saved_planets):
+    # Act
+    response = client.delete("/planets/1")
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 200
+    assert response_body == "Planet #1 Mercury successfully deleted"
+
+def test_delete_planet_missing_record(client, two_saved_planets):
+    # Act
+    response = client.delete("/planets/3")
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 404
+    assert response_body == {"message": "Planet 3 not found"}
+
+def test_delete_planet_invalid_id(client, two_saved_planets):
+    # Act
+    response = client.delete("/planets/dog")
+    response_body = response.get_json()
+
+    # Assert
+    assert response.status_code == 400
+    assert response_body == {"message": "Planet dog invalid"}
+
+def test_validate_model(two_saved_planets):
+    # Act
+    result_planet = validate_model(Planet, 1)
+
+    # Assert
+    assert result_planet.id == 1
+    assert result_planet.name == "Mercury"
+    assert result_planet.description == "smallest planet"
+    assert result_planet.diameter == 3031.9
+
+def test_validate_model_missing_record(two_saved_planets):
+    # Act & Assert
+    with pytest.raises(HTTPException):
+        result_planet = validate_model(Planet, "3")
+    
+def test_validate_model_invalid_id(two_saved_planets):
+    # Act & Assert
+    with pytest.raises(HTTPException):
+        result_planet = validate_model(Planet, "dog")
\ No newline at end of file