Education · Android
Lookup: Night Sky & Stars
An offline-first star map. It overlays your camera with every naked-eye star (about 9,100), all 88 constellations, the Sun, Moon and planets, and the International Space Station, computed for your location and the current moment.
Features
- Real-time sky map with ~9,100 stars and 88 constellations
- Optional AR camera overlay
- Sun, Moon and all planets
- ISS live position and orbital trail
- Educational cards for stars, planets and constellations
- Time travel ±24 hours
- Works offline; no ads, tracking or account
Permissions
What the app asks for, and why.
| Approximate location | To compute what's visible from where you are. Processed on the device only. Optional — a default location is used if denied. |
|---|---|
| Camera | For the optional live overlay. Frames go straight to the screen; nothing is captured, saved or sent. |
| Internet | One request a day to CelesTrak for the ISS orbit data. No user data is attached. |
Full details: Lookup privacy policy
Help & troubleshooting
The stars don't line up with the real sky.
This is almost always the phone's compass. Calibrate it by moving the phone in a figure-8 a few times. Stay away from metal, cars, speakers and magnets, and take the phone out of cases with magnetic clasps or mounts.
The camera view is black.
Allow camera access for Lookup in Android settings → Apps → Lookup → Permissions. If another app is using the camera, close it. The star map works without the camera too.
The ISS isn't shown.
Lookup needs to go online once a day to fetch the station's orbit. Connect briefly and reopen the app. Without that data it simply hides the ISS.
The sky looks right but for the wrong place.
If location permission is denied, Lookup uses a default location. Grant approximate location to see your own sky.
Does Lookup collect anything about me?
No. There's no account, no analytics and no ads, and your location never leaves the phone.