First quarter Moon

First quarter Moon

C011/1546 Rights Managed

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This image is part of the sequence space: lunar phases (2011)

Credit: NASA/GSFC-SVS/SCIENCE PHOTO LIBRARY

Caption: First quarter Moon. The lunar phases arise as the Earth-Moon-Sun angle changes as the Moon orbits the Earth. This waxing Moon is 7 days into its 28-day cycle (first quarter). On a waxing Moon, the day-night line (terminator) marks the lunar dawn as sunlight advances over the Earth-facing side of the Moon. This image, published in 2011, combines data from the Clementine and Lunar Reconnaissance Orbiter spacecraft. The image is part of a sequence of lunar phases (see images C011/1544-1551), orientated for the northern hemisphere. As well as the phases, the sequence also shows variations in the Moon's position and angle.

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Keywords: 1st, 2011, 21st century, 750 nanometre basemap, 750-nm basemap, astronomical, astronomy, clementine, digital elevation map, first quarter, half moon, lola, lro, lunar, lunar orbiter laser altimeter, lunar reconnaissance orbiter, monthly cycle, moon, northern hemisphere, phase, phases, planetary science, probe, selenology, sequence, series, solar system, space, spacecraft, ultraviolet visible camera, uvvis camera, waxing

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