Spacetime
World clock and sky map
A watchface showing real planetary positions, rotating starfield, and moon phases. The sky as you experience it from Earth—updated in real time.
Explore the clock
Speed up time to see how Earth, Moon, and planets move. The clock shows how time is connected with space.
Real time
The Earth rotates counter-clockwise, completing one rotation per day. The hour hand marks your timezone's meridian. The upper half of the map is in daylight, the lower half in night.
1 hour/sec
Watch the continents sweep past the Sun. Notice how the hour hand follows Earth's rotation—when your location is at the top, it's solar noon.
1 day/sec
The Moon becomes visible, racing around the ecliptic in about 27 days. Its phase changes with position: new when near the Sun, full when opposite.
1 week/sec
Mercury and Venus swing back and forth near the Sun. They never stray far—always evening or morning stars, never visible at midnight.
1 month/sec
The outer planets drift slowly along the ecliptic. Mars takes about 2 years to orbit, Jupiter 12 years, Saturn nearly 30.
1 year/sec
At this speed, the display switches to fixed ecliptic mode. The Sun moves around the zodiac while outer planets trace their orbits. Watch for retrograde loops when Earth overtakes them.
Features
Real-time planetary positions
All 8 planets, Sun, and Moon positioned on the ecliptic exactly where they are in the sky right now.
Rotating starfield
Stars from the HYG database, rotating with sidereal time. Watch the Milky Way sweep across the sky.
Moon phases
Current lunar phase displayed as it appears tonight—waxing, waning, full, or new.
Saturn's rings
Ring tilt matches the current Saturnian year. Watch them edge-on in 2025, then slowly open again.
Hour hand as compass
Red points north, white points south. They meet at your latitude, overlaid on your timezone's meridian.
Earth from above
North Pole at center, rotating counter-clockwise as Earth does. Your meridian sweeps across the day.
Optional layers
Disabled by default for a cleaner look. Enable in settings.
- ◦Grid lines — Judge time across the globe at a glance
- ◦Horizon circle — See which portion of the sky is currently visible from your location
Requirements
Wear OS 4+ required. Tested on Pixel Watch 4.