Lens

Camera hardware

Software boost works on every phone

Diagnostics

Open the camera to see its status.

Reset camera settings

A phone camera in live video can show bright stars and planets, the Moon, and bright satellites such as the ISS, Tiangong and fresh Starlink “trains”. For the best chance, use Night sky, rest the phone on something steady, and look 1–2 hours after sunset or before sunrise, when satellites are still in sunlight but your sky is dark. Fainter satellites won’t show on camera, but the overlay still marks exactly where each one is.

Show

Trajectories selected & hovered object Satellite trails Satellite names Constellation lines Star names Alt/az grid Red night vision keeps your eyes dark-adapted

Live satellites CelesTrak TLEs

Space stations ISS, Tiangong Starlink ~10,000 satellites Brightest satellites Weather Science Amateur radio GPS / GNSS

Camera

Lens field of view

If labels drift away from real objects near the screen edges, adjust this until they line up.

Compass

Heading offset Reset calibration

Location

Check this position on a map →

Planets, Sun and Moon: Astronomy Engine (VSOP87, ±1″). Asteroids: today's NASA/JPL Horizons elements. Satellites: SGP4 on CelesTrak TLEs, recomputed every frame. Stars and distances: Hipparcos via d3-celestial and the HYG database (CC BY-SA 4.0). Pointing accuracy depends on your phone's compass (typically ±5–10°); tap Align on a known object to correct it.