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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...


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.


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.


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.


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.


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.


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...