A Python wrapper and command-line interface for NASA's REST APIs, including Astronomy Picture of the Day (APOD), Mars Rover Photos, and TechTransfer APIs.

• 🌟 Easy-to-use Python API for NASA's APOD, Mars Rover Photos, and TechTransfer services
• 🖥️ Beautiful command-line interface with rich formatting
• 🔴 Mars Rover Photos - Access photos from Perseverance, Curiosity, Opportunity, and Spirit
• 🔬 TechTransfer - Search NASA patents, software, and spinoff technologies
• 🔑 Flexible authentication (API key or environment variables)
• 📊 Comprehensive data models with validation
• 🛡️ Robust error handling and retry logic
• 🧪 Well-tested with comprehensive unit tests
• 📚 Extensible design for future NASA APIs

pip install pyasan

git clone https://github.com/jeorryb/pyasan.git
cd pyasan
pip install -e .

1. Visit https://api.nasa.gov/
2. Fill out the form to get your free API key
3. Set it as an environment variable:

   export NASA_API_KEY=your_api_key_here

from pyasan import APODClient

# Initialize client (uses NASA_API_KEY env var by default)
client = APODClient()

# Or provide API key directly
client = APODClient(api_key="your_api_key_here")

# Get today's APOD
apod = client.get_apod()
print(f"Title: {apod.title}")
print(f"Date: {apod.date}")
print(f"URL: {apod.url}")
print(f"Explanation: {apod.explanation}")

# Get APOD for a specific date
apod = client.get_apod(date="2023-01-01", hd=True)

# Get random APOD
random_apod = client.get_random_apod()

# Get multiple random APODs
random_apods = client.get_random_apod(count=5)
for apod in random_apods:
    print(apod.title)

# Get APOD for a date range
apods = client.get_apod_range(
    start_date="2023-01-01", 
    end_date="2023-01-07"
)

# Get recent APODs
recent = client.get_recent_apods(days=7)

from pyasan import MarsRoverPhotosClient

# Initialize client
client = MarsRoverPhotosClient(api_key="your_api_key_here")

# Get available rovers
rovers = client.get_available_rovers()
print(rovers)  # ['perseverance', 'curiosity', 'opportunity', 'spirit']

# Get photos by Martian sol (day)
photos = client.get_photos_by_sol("curiosity", sol=1000, camera="MAST")
print(f"Found {len(photos)} photos from Sol 1000")

# Get photos by Earth date
photos = client.get_photos_by_earth_date("perseverance", "2023-01-01")
for photo in photos:
    print(f"Photo ID: {photo.id}, Camera: {photo.camera.full_name}")

# Get latest photos
latest = client.get_latest_photos("curiosity")
print(f"Latest photos: {len(latest)}")

# Get mission manifest
manifest = client.get_manifest("curiosity")
print(f"Total photos: {manifest.photo_manifest.total_photos:,}")
print(f"Mission status: {manifest.photo_manifest.status}")

# Get available cameras for a rover
cameras = client.get_rover_cameras("perseverance")
print(f"Perseverance cameras: {cameras}")

from pyasan import TechTransferClient

# Initialize client
client = TechTransferClient(api_key="your_api_key_here")

# Search patents
patents = client.search_patents("solar energy", limit=5)
print(f"Found {len(patents)} patents")
for patent in patents:
    print(f"- {patent.title}")
    if patent.patent_number:
        print(f"  Patent Number: {patent.patent_number}")

# Search software
software = client.search_software("machine learning", limit=3)
for item in software:
    print(f"- {item.title}")
    if item.version:
        print(f"  Version: {item.version}")

# Search spinoff technologies
spinoffs = client.search_spinoffs("medical", limit=3)
for spinoff in spinoffs:
    print(f"- {spinoff.title}")
    if spinoff.company:
        print(f"  Company: {spinoff.company}")

# Search all categories at once
all_results = client.search_all("robotics", limit=2)
for category, results in all_results.items():
    if not category.endswith("_error"):
        print(f"{category}: {len(results)} results")

# Get available categories
categories = client.get_categories()
print(f"Available categories: {categories}")

The CLI provides a beautiful, user-friendly interface to NASA's APIs:

# Get today's APOD
pyasan apod get

# Get APOD for a specific date
pyasan apod get --date 2023-01-01

# Get HD version
pyasan apod get --date 2023-01-01 --hd

# Get random APOD
pyasan apod random

# Get 5 random APODs
pyasan apod random --count 5

# Get APODs for a date range
pyasan apod range --start-date 2023-01-01 --end-date 2023-01-07

# Get recent APODs
pyasan apod recent --days 7

# Hide explanation text for cleaner output
pyasan apod get --no-explanation

# Get photos by sol (Martian day)
pyasan mars photos --rover curiosity --sol 1000 --camera MAST

# Get photos by Earth date
pyasan mars photos --rover perseverance --earth-date 2023-01-01

# Get latest photos from a rover
pyasan mars latest --rover curiosity

# Get mission manifest
pyasan mars manifest --rover curiosity

# List available cameras for a rover
pyasan mars cameras --rover perseverance

# Get photos with pagination
pyasan mars photos --rover curiosity --sol 1000 --page 2

# Hide detailed photo information
pyasan mars photos --rover curiosity --sol 1000 --no-details

# Search NASA patents
pyasan techtransfer patents "solar energy" --limit 5

# Search NASA software
pyasan techtransfer software "machine learning" --limit 3

# Search NASA spinoff technologies
pyasan techtransfer spinoffs "medical devices" --limit 5

# Search across all categories
pyasan techtransfer search "robotics" --limit 3

# Search specific category only
pyasan techtransfer search "artificial intelligence" --category software

# Use pagination
pyasan techtransfer patents "space technology" --page 2 --limit 10

# Hide detailed information
pyasan techtransfer patents "propulsion" --no-details

# List available categories
pyasan techtransfer categories

# Use specific API key for any command
pyasan apod get --api-key your_api_key_here
pyasan mars photos --rover curiosity --sol 1000 --api-key your_api_key_here
pyasan techtransfer patents "space technology" --api-key your_api_key_here

# Show version
pyasan --version

The main client for interacting with NASA's APOD API.

Get Astronomy Picture of the Day for a specific date.

Parameters:

• date (str|date, optional): Date in YYYY-MM-DD format or date object. Defaults to today.
• hd (bool): Return HD image URL if available
• thumbs (bool): Return thumbnail URL for videos

Returns: APODResponse

Get random Astronomy Picture(s) of the Day.

Parameters:

• count (int): Number of random images to retrieve (1-100)
• hd (bool): Return HD image URLs if available
• thumbs (bool): Return thumbnail URLs for videos

Returns: APODResponse if count=1, APODBatch if count>1

Get Astronomy Pictures of the Day for a date range.

Parameters:

• start_date (str|date): Start date in YYYY-MM-DD format or date object
• end_date (str|date): End date in YYYY-MM-DD format or date object
• hd (bool): Return HD image URLs if available
• thumbs (bool): Return thumbnail URLs for videos

Returns: APODBatch

Get recent Astronomy Pictures of the Day.

Parameters:

• days (int): Number of recent days to retrieve (1-100)
• hd (bool): Return HD image URLs if available
• thumbs (bool): Return thumbnail URLs for videos

Returns: APODBatch

The main client for interacting with NASA's Mars Rover Photos API.

Get Mars rover photos by sol or Earth date.

Parameters:

• rover (str): Rover name (perseverance, curiosity, opportunity, spirit)
• sol (int, optional): Martian sol (day) - cannot be used with earth_date
• earth_date (str|date, optional): Earth date in YYYY-MM-DD format - cannot be used with sol
• camera (str, optional): Camera abbreviation (e.g., FHAZ, RHAZ, MAST, NAVCAM)
• page (int, optional): Page number for pagination

Returns: MarsPhotosResponse

Get Mars rover photos by Martian sol.

Parameters:

• rover (str): Rover name
• sol (int): Martian sol (day)
• camera (str, optional): Camera abbreviation
• page (int, optional): Page number for pagination

Returns: MarsPhotosResponse

Get Mars rover photos by Earth date.

Parameters:

• rover (str): Rover name
• earth_date (str|date): Earth date in YYYY-MM-DD format or date object
• camera (str, optional): Camera abbreviation
• page (int, optional): Page number for pagination

Returns: MarsPhotosResponse

Get the latest photos from a Mars rover.

Parameters:

• rover (str): Rover name

Returns: MarsPhotosResponse

Get mission manifest for a Mars rover.

Parameters:

• rover (str): Rover name

Returns: ManifestResponse

Get list of available cameras for a rover.

Parameters:

• rover (str): Rover name

Returns: List[str] - List of camera abbreviations

Get list of available rovers.

Returns: List[str] - List of rover names

Represents a single APOD entry.

Attributes:

• title (str): The title of the image
• date (date): The date of the image
• explanation (str): The explanation of the image
• url (str): The URL of the image
• media_type (str): The type of media (image or video)
• hdurl (str, optional): The URL of the HD image
• thumbnail_url (str, optional): The URL of the thumbnail
• copyright (str, optional): The copyright information

Properties:

• is_video (bool): Check if the media is a video
• is_image (bool): Check if the media is an image

Represents multiple APOD entries.

Attributes:

• items (List[APODResponse]): List of APOD responses

Methods:

• __len__(): Get the number of items
• __iter__(): Iterate over items
• __getitem__(index): Get item by index

Represents a single Mars rover photo.

Attributes:

• id (int): Photo ID
• sol (int): Martian sol (day)
• camera (Camera): Camera information
• img_src (str): Image source URL
• earth_date (date): Earth date when photo was taken
• rover (Rover): Rover information

Represents multiple Mars rover photos.

Attributes:

• photos (List[MarsPhoto]): List of Mars photos

Methods:

• __len__(): Get the number of photos
• __iter__(): Iterate over photos
• __getitem__(index): Get photo by index

Represents a Mars rover mission manifest.

Attributes:

• name (str): Rover name
• landing_date (date): Landing date on Mars
• launch_date (date): Launch date from Earth
• status (str): Mission status
• max_sol (int): Maximum sol with photos
• max_date (date): Most recent Earth date with photos
• total_photos (int): Total number of photos
• photos (List[ManifestPhoto]): Photo information by sol

Represents camera information.

Attributes:

• id (int): Camera ID
• name (str): Camera abbreviation
• rover_id (int): Rover ID
• full_name (str): Full camera name

Represents rover information.

Attributes:

• id (int): Rover ID
• name (str): Rover name
• landing_date (date): Landing date on Mars
• launch_date (date): Launch date from Earth
• status (str): Mission status

The main client for interacting with NASA's TechTransfer API.

Search NASA patents by query string.

Parameters:

• query (str): Search query string
• limit (int, optional): Maximum number of results (1-100)
• page (int, optional): Page number for pagination

Returns: TechTransferPatentResponse containing patent results

Search NASA software by query string.

Parameters:

• query (str): Search query string
• limit (int, optional): Maximum number of results (1-100)
• page (int, optional): Page number for pagination

Returns: TechTransferSoftwareResponse containing software results

Search NASA spinoff technologies by query string.

Parameters:

• query (str): Search query string
• limit (int, optional): Maximum number of results (1-100)
• page (int, optional): Page number for pagination

Returns: TechTransferSpinoffResponse containing spinoff results

Search across all TechTransfer categories or a specific category.

Parameters:

• query (str): Search query string
• category (str, optional): Specific category ('patent', 'software', 'spinoff')
• limit (int, optional): Maximum number of results per category
• page (int, optional): Page number for pagination

Returns: Dictionary with category names as keys and response objects as values

Get list of available TechTransfer categories.

Returns: List of category names

Represents a NASA patent.

Attributes:

• id (str): Patent ID
• title (str): Patent title
• abstract (str): Patent abstract
• patent_number (str): Patent number
• case_number (str): NASA case number
• publication_date (date): Publication date
• category (str): Technology category
• center (str): NASA center
• innovator (str): Inventor/innovator
• contact (str): Contact information

Represents NASA software.

Attributes:

• id (str): Software ID
• title (str): Software title
• description (str): Software description
• release_date (date): Release date
• version (str): Software version
• category (str): Technology category
• center (str): NASA center
• language (str): Programming language
• license (str): License information
• contact (str): Contact information

Represents a NASA spinoff technology.

Attributes:

• id (str): Spinoff ID
• title (str): Spinoff title
• description (str): Spinoff description
• publication_year (int): Publication year
• category (str): Technology category
• center (str): NASA center
• company (str): Company name
• state (str): State
• benefits (str): Benefits description
• applications (str): Applications

• NASA_API_KEY: Your NASA API key
• NASA_API_TOKEN: Alternative name for the API key

1. Direct parameter: APODClient(api_key="your_key")
2. Environment variable: NASA_API_KEY
3. Environment variable: NASA_API_TOKEN
4. Default: DEMO_KEY (limited requests)

PyASAN provides comprehensive error handling:

from pyasan import APODClient
from pyasan.exceptions import (
    ValidationError, 
    APIError, 
    AuthenticationError, 
    RateLimitError
)

client = APODClient()

try:
    apod = client.get_apod(date="invalid-date")
except ValidationError as e:
    print(f"Invalid input: {e}")
except AuthenticationError as e:
    print(f"API key issue: {e}")
except RateLimitError as e:
    print(f"Rate limit exceeded: {e}")
except APIError as e:
    print(f"API error: {e}")

git clone https://github.com/yourusername/pyasan.git
cd pyasan
python -m venv venv
source venv/bin/activate  # On Windows: venv\\Scripts\\activate
pip install -e ".[dev]"

# Run all tests
pytest

# Run with coverage
pytest --cov=pyasan

# Run specific test file
pytest tests/test_apod.py

# Format code with black
black pyasan tests

# Check with flake8
flake8 pyasan tests

# Type checking with mypy
mypy pyasan

• APOD API support
• Mars Rover Photos API
• TechTransfer API support
• Earth Polychromatic Imaging Camera (EPIC) API
• Near Earth Object Web Service (NeoWs)
• Exoplanet Archive API
• Image and Video Library API
• Async support
• Caching support
• Image download utilities

Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

This project is licensed under the MIT License - see the LICENSE file for details.

• NASA for providing free access to their amazing APIs
• The astronomy community for inspiring space exploration
• All contributors who help improve this project

• NASA API Portal
• APOD API Documentation
• TechTransfer API Documentation
• PyPI Package
• GitHub Repository

Made with ❤️ for the astronomy and Python communities.