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www.reference.com/article/moons-8d0623a43d2870e7

A moon is a natural satellite consisting of solid material that naturally orbits a planet or dwarf planet. Although the Earth has just one moon, there are other planets that have more, and some that even have none. Moons and their planets often have very symbiotic, or c...

www.reference.com/article/types-moons-db4b3ee1121eb0b5

There are eight different phases or "types" of the moon: new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, last quarter and waning crescent. These phases repeat themselves approximately every 29.5 days.

www.reference.com/article/blood-moon-98f327e46768d925

In astronomy, the term blood moon refers to a complete lunar eclipse which causes the moon to appear red. The moon looks red due to dispersed light from Earth's sunrises and sunsets that is refracted back onto the moon's surface.

www.reference.com/article/weight-moon-ec9111df03da876d

The moon has a mass of 7.35 x 10²² kilograms. It is only about 60 percent as dense as Earth, and as such, the moon's mass is only 1.2 percent of Earth's. Thus, it would take the mass of 81 moons to equal the mass of Earth.

www.reference.com/article/many-moons-2880b2f85779fa7

There are 146 official moons in the solar system. This does not include the 27 additional celestial objects orbiting planets, the five moons orbiting the dwarf planet Pluto or the tiny moons orbiting celestial bodies other than planets and the asteroids.

www.reference.com/article/blue-moon-f6c04a074b4bb74b

A Blue Moon is the second of two full moons in one calendar month. The term originated from modern folklore. The moon doesn't actually appear to shine the color blue; rather, it looks like regular full moons.

www.reference.com/article/surface-moon-like-fb974463322c7b07

The moon's surface is solid and rocky, covered with many small and large craters caused by impacts. The lunar surface also consists of mountains, massive rocks and cracks that may have formed from lava flow. The moon is also covered in a whitish-gray ground-up rock call...