This Hour's Moon
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- Phase
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- Illuminated
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- Distance
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- Apparent size
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- Moonrise
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- Moonset
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Rise and set for your location — set it on the dashboard.
The Month Ahead
Thirty days of moon in a few seconds. Watch two things: the phase sweeping through its cycle, and the whole disk slowly rocking side to side. That wobble is libration — the Moon's orbit is tilted and not quite circular, so over a month we peek slightly around its edges. We see about 59% of the Moon from Earth, not 50%.
30-day loop
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Phase Calendar · —
Computed in your browser for every day this month. The percentage is how much of the visible disk is lit at midday.
SunMonTueWedThuFriSat
Eclipses, From Where You Stand
Eclipse maps tell you where the shadow goes. This tells you what you'll see — computed for your location (set it on the dashboard).
The Almanac
What the Moon does next — quarters, closest and farthest approach, and the next time it slides into Earth's shadow.
About these predictions
Quarters, apsides, and eclipses are computed in your browser with Astronomy Engine, which is accurate to about a minute over centuries. The moon renders come from NASA's Scientific Visualization Studio, generated for every hour of the year from Lunar Reconnaissance Orbiter terrain and imagery. A perigee full moon — a "supermoon" — looks about 14% bigger and 30% brighter than one at apogee.