25.7 MB (806.0 KB compressed)
3631 x 2478 pixels
30.7 x 21.1 cm ⏐ 12.1 x 8.3 in (300dpi)
LARRY LANDOLFI / SCIENCE PHOTO LIBRARY LARRY LANDOLFI / SCIENCE PHOTO LIBRARY
8 Day Old Moon , one day past first quarter. Image 8 of 27. Waxing (increasing in apparent size) gibbous Moon 8 days into its 28-day cycle. The lunar phases arise as the Moons orbit of the Earth shows the Earth-facing side moving into and out of the light of the Sun. This Earth-facing side of the Moon is locked in place by the gravitational influence of the Earth. This results in a lunar day that equals the length of the lunar Earth orbit. On a waxing Moon the day-night line (terminator) marks the lunar dawn. The Moon is gibbous when it is more than half full.
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