Moon

Moon

The Earth's only natural satellite. The moon has a cold, dry orb covered with many lunar craters and strewn with rocks and dust. The moon has no atmosphere. But recent lunar missions have found plenty frozen water on the moon.

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Moon

last quarter

Astronomy; Moon

The phase of the Moon between the Waning Gibbous and the Waning Crescent when it is 90 degrees away from a line between the Sun and the Earth, where fifty percent of the Moon is still visible before ...

latitude

Astronomy; Moon

Lines of measurement around a planet or the Moon, parallel to its equator. Measured in degrees, with the equator being 0 degrees and the poles 90 degrees north or south.

librations

Astronomy; Moon

The gentle rocking motion of the Moon as it orbits in its elliptical orbit around Earth that allow slightly more than half of the Moons surface to be visible over a period of time.

limb

Astronomy; Moon

The outermost or visible edge of a planetary body such as the Moon.

longitude

Astronomy; Moon

Lines of measurement at right angles to the equator of a planet or the Moon. Measured in degrees of angle from a designated line of 0 degrees. On the Moon, 0 degrees longitude is at the center of ...

lunar day

Astronomy; Moon

The period of time between two successive transits of the Moon over the same meridian. The mean lunar day is 24-84 hours (1. 035 times the mean solar day). Not the same thing as a day on the Moon, ...