Illumination
A fraction of sunlight.
The percentage of the visible lunar disc lit by the Sun. It does not tell you how bright your surroundings are.
01 / The lunar atlas
The moon,
in detail.
A closer look at our closest neighbour.
Explore its phase, light and changing presence in the sky.
Explore the cycleChoose your location to explore the lunar cycle.Calculated for your selected time
02 / Explore the cycle
One moon. A changing perspective.
Move through the lunar month. Watch the phase, age and illumination change together.
Explore the next 30 days from today. Use the slider, arrow keys or phase buttons to select a time. Choose Today to return to the current Moon. Your watch always shows its current reading.
Moon age
Time since a new beginning.
Days elapsed since the preceding new moon. A lunar month lasts about 29.5 days, with natural variation.
Apparent size
A changing distance.
Relative apparent diameter: 100% at the watch’s 384,400 km reference distance. This is separate from the drawn Moon’s pixel size.
03 / On your wrist
A little detail.
A deeper connection.
The lunar view from your watch, made easier to understand.
- The Moon, upper right.Texture, lit side and phase in one glance. Choose sky relative orientation or an upright phase.
- The curve below the time.Follow the Moon above and below your horizon across a rolling 24 hour window.
- The selected readout beneath.Choose one Moon detail, such as illumination, age or the next dark window.