Astry

Explore space data from NASA and partners: daily discoveries, Mars rover images, real-time space weather, Earth (EPIC) views, and exoplanets — fast, offline-friendly, and privacy‑respecting.

• Quick links:
  • Features overview: docs/features.md
  • Discovery (APOD): docs/discovery.md
  • Mars Rover: docs/rover.md
  • Earth View (EPIC): docs/earth.md
  • Deep Dive (Space Weather • Asteroids • Events): docs/deep_dive.md
  • Exoplanets: docs/exoplanets.md
  • APIs used: docs/apis.md
  • Caching strategy: docs/caching.md
  • Troubleshooting: docs/troubleshooting.md

Highlights

• Discovery: incremental APOD feed with pull‑to‑refresh and caching
• Rover: browse Curiosity/Opportunity/Spirit with filters and details
• Earth View: EPIC (Natural/Enhanced), date picker, details, POWER climate panel
• Deep Dive: DONKI (space weather), NeoWs (today's flybys by date), EONET events, date filter
• Exoplanets: latest‑first infinite scroll, tabs (All/Recent/TESS), advanced filters (name/method/facility/year), instant detail sheet
• Consistency: dd‑mm‑yyyy date format, lazy page creation, app‑wide JSON/image caching

Tech & APIs

• Flutter (Material dark theme)
• On‑disk JSON + image caching with sensible TTLs
• APIs: NASA DONKI, NeoWs, EPIC, POWER, Exoplanet Archive TAP, EONET

Getting Started

Prerequisites

• Flutter SDK (stable)
• A free NASA API key from https://api.nasa.gov

Set environment variable

• Linux/macOS (zsh):
  • export NASA_API_KEY=YOUR_KEY
• Windows (PowerShell):
  • setx NASA_API_KEY "YOUR_KEY"

Install and run

• flutter pub get
• flutter run

Tests and analysis

• flutter test
• flutter analyze

Notes

• Some endpoints may rate‑limit; retries and fallbacks are implemented.
• Data availability varies by date (EPIC images, exoplanet queries).

License

• See repository license (if provided). All trademarks belong to their respective owners.