Space Arc
Celestial Event Tracker
About
Explore celestial events with real-time data from NASA and other space agencies. Track satellites, view stunning astronomy pictures, and get personalized alerts for meteor showers, eclipses, and aurora.
What's New in Space Arc
1.0.3
April 13, 2026
Tracking more satellites than ever! Bugs squashed.
Developer apps
FAQ
What celestial events can Space Arc track?
Space Arc tracks a wide range of celestial events including meteor showers, solar and lunar eclipses, planetary oppositions, supermoons, blue moons, and aurora alerts. It provides precise dates and rich viewing guides for each.
How does Space Arc provide viewing information?
Space Arc syncs live data from NASA, SpaceX, NOAA Space Weather, and other agencies, combining it with real-time weather from Apple Weather. This allows it to provide rise and set times, visual magnitude, and brightness labels for visible planets.
Does Space Arc offer offline access?
Yes, Space Arc works offline by caching events locally, ensuring the app loads instantly. It refreshes in the background and only fetches changed data.
How does Space Arc notify users about events?
Space Arc provides smart notifications for tracked events, scheduling alerts at 1 hour, 30 minutes, 10 minutes, and the moment an event begins. It also includes weather-aware visibility checks.
What is the 'Tonight Score' in Space Arc?
The 'Tonight Score' is a number from 0-100 that indicates how good the current night is for stargazing. It factors in cloud cover, light pollution timing, moon phase, and upcoming events.
Does Space Arc have ads?
Yes, Space Arc contains advertisements. As it is free to download and use, ads are displayed to support the app's development and data access.
What devices is Space Arc available on?
Based on the provided data, Space Arc is currently supported on iPhone devices.
How often is Space Arc updated?
The latest version of Space Arc is 1.0.3, and it was last updated on April 13, 2026. This indicates a relatively frequent update schedule.