Sky

Christian Sandmann

Watchface
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Description

Sky turns your wrist into a window onto the sky above you.

Point your watch in any direction and Sky shows what is actually there: the Sun, the Moon, and any of the seven other planets currently above the horizon in that direction, tracked live as you turn using the watch's compass. Each body is drawn as a small icon, positioned by its real azimuth and altitude -- turn your wrist and the sky scrolls past like an AR window.

The first dial also shows Andromeda, the Orion Nebula, the Pleiades, the Beehive Cluster, the Hercules Cluster, the Double Cluster and both Magellanic Clouds -- drawn as small violet squares (the planets are cerulean circles) and only appearing once the Sun drops below -12 degrees altitude. Time and date are shown below the horizon.

Shake the watch for a second dial: a heliocentric diagram of the whole solar system, Sun at the center, all eight planets laid out on their orbits.

New: the weekday and the date follow your Pebble's language, or you pick one on the phone's settings page: German, English, French, Spanish, Italian or Portuguese.

Under the hood, Sky computes every position itself with a low-precision orbital-mechanics engine written from scratch (the Astronomical Almanac's low-precision solar formula, a truncated lunar theory, and classic osculating Keplerian elements for the planets), running on the phone from your GPS location and cross-checked against PyEphem to within a fraction of a degree. The watch itself never does any of that math -- it only receives plain numbers over Bluetooth and places them on screen with simple integer arithmetic, keeping it fast and battery-friendly.

A small lightning-bolt icon appears beside the time if the phone connection is lost. A GPS-unavailable icon shows whenever the phone's last location fix failed, and hides once it succeeds.

For Pebble Time 2 and Pebble Round 2. The settings page is in German. 
Development supported by Claude and the skill for it.
  • DeveloperChristian Sandmann
  • CategoryFaces
  • PlatformsTime 2, Round 2
  • Updated2026-10-11
  • Version1.3.0
  • Battery ImpactNot enough data yet