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You are here: Home / Science / The Moon

The Moon

June 22, 2013 by admin

Earth to Outer Space Facts – The Moon



facts about the Moon

Replayed from a 1950s era comic book  


Earth and some Moon Facts

Everyone is aware of the moon, but here is more information about it. The Moon is the only natural satellite of the Earth, and the fifth largest satellite in the Solar System. It is the largest natural satellite of a planet in the Solar System relative to the size of the planet it belongs to, having 27% the diameter and 60% the density of Earth, resulting in 1⁄81 its mass. The Moon is the second densest satellite after Io, a satellite of Jupiter.

The Moon is in synchronous rotation with Earth, meaning it always shows the same face with its near side marked by dark volcanic maria that fill between the bright ancient crustal highlands and prominent impact craters. It is the brightest object in the sky after the Sun, although its surface is actually very dark, with a reflectance similar to that of coal. Its prominence in the sky and its regular cycle of phases have, since ancient times, made the Moon an important cultural influence on language, calendars, art and mythology.

orange moon during a total lunar eclipse

The moon turns red and orange during a total lunar eclipse.

We are all familiar with some effects the moon has on us. The Moon’s gravitational influence produces the ocean tides. It also causes a minute lengthening of the day. The Moon’s current orbital distance, about thirty times the diameter of the Earth, causes it to appear almost the same size in the sky as the Sun, allowing it to cover the Sun nearly precisely in total solar eclipses. This matching of apparent visual size is a coincidence. The Moon’s linear distance from the Earth is currently increasing at a rate of 3.82±0.07cm per year, but this rate is not constant.

There have been several hypotheses for the moon’s origin in the past but the current most widely accepted explanation is that the Moon formed from the debris left over after a giant impact between Earth and a Mars-sized body nearly 4.5 billion years ago, not long after the Earth. The Moon is the only celestial body other than Earth on which humans have set foot.

The Soviet Union’s Luna program was the first to reach the Moon with unmanned spacecraft in 1959; the United States’ NASA Apollo program achieved the only manned missions to date, beginning with the first manned lunar orbiting mission by Apollo 8 in 1968, and six manned lunar landings between 1969 and 1972, with the first being Apollo 11. These missions returned over 380 kg of lunar rocks, which have been used to develop a geological understanding of the Moon’s origins, the formation of its internal structure, and its subsequent history.


This work (comics and cartoons) is licensed under a
Creative Commons Attribution-NonCommercial 2.5 License.


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Filed Under: Science Tagged With: Moon Facts, the moon

About admin

Charles, a retired Programmer/Analyst, senior citizen, website nerd w/50+ websites. Owner of TravelESP.com. Visit his personal blog at Yolky.com. Visit his DogSploot.com A site all about dogs.


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