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

lunar interval

Astronomy; Moon

The difference in time between a phase of the Moon or tide occurring at the Greenwich meridian and a local meridian. This interval represents the passage of the Moon during this time.

lunar rays

Astronomy; Moon

Visible streaks on the surface of the Moon which radiate away from some craters.

lunartidal interval

Astronomy; Moon

The period of time between the transit of the Moon and the following high or low tide.

magnitude

Astronomy; Moon

A numerical value indicating the brightness of an object in space. A lower magnitude number indicates a brighter object.

mare

Astronomy; Moon

Name given to the low, dark plains composed of basalt on the Moon. From the Latin word for 'sea', so-called due to their large landmass. These basalt deposits were left by the eruptions of ...

mascon

Astronomy; Moon

An area of the Moons curst formed from dense, thick lunar material and having strong local gravitational effects.

mean

Astronomy; Moon

A mathematical average of a set of numbers or measurements, with the mean equaling the sum of the numbers divided by the number of units. The mean radius of the Moon, for example, is the average ...