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The Moon is Earth's only permanent natural satellite. It is one of the largest natural satellites in ..... Earth and the Moon are nevertheless still considered a planet–satellite system, r...

Is The Moon A Planet? - Universe Today


What makes a planet a planet? The Moon is so big compared to the Earth -- roughly one-quarter our planet's size -- that occasionally you will hear our syst.

Is the Moon a planet? - io9 - Gizmodo


Aug 27, 2013 ... This makes the motion of the Earth-Moon system as it orbits the sun something like a ... So...why isn't the Moon considered to be a planet?

Our moon would be a planet under new definition of planethood ...


Nov 13, 2015 ... When is the moon not a moon? If a new proposal for defining planethood is adopted, the moon could be considered a planet in its own right.

Moon, Planet or Star? - Astrobiology Magazine


Feb 8, 2005 ... Moons circle planets, and planets circle stars. Now, astronomers have learned that planets may also circle celestial bodies almost as small as ...

Why is the moon not a planet? | Reference.com


The moon is not a planet because, by definition, a planet is a "spherical ball of rock or gas that orbits a star," according to About.com. While the moon is a ...

astronomy - Is the moon a planet? - Physics Stack Exchange


Dec 23, 2011 ... Can our moon qualify as a planet? With regard or without regard to the exact definition of the planet, can the moon be considered as planet as ...

is the moon a planet or a star? | Yahoo Answers


May 6, 2009 ... i would like to know if the moon is a planet since we landed on it. ... surface of the Earth, it would indeed be considered an independent planet.

Earth's Moon Could Become a Planet - Space.com


Aug 17, 2006 ... If astronomers approve a newly proposed planet definition next week, things could get really strange.

What Is a Blue Moon? - Space.com


May 20, 2016 ... Today, either definition of "Blue Moon" is considered valid. As Texas astronomer Donald W. Olson wrote in a 2006 column for the magazine, ...

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What Is A Moon? - Universe Today


Jan 15, 2016 ... Before the invention of the telescope in the early 1600's, man just knew of the Moon -- a round, mysterious astronomical object that people ...

Why Isn't the Moon Considered a Planet? | RealClearScience


Aug 28, 2013 ... There are a lot of weird moons in our solar system, but ours is probably the weirdest. For one thing, it's really damn big. It's practically a planet.

Defining "Moon" - Space/Astronomy - About.com


Mar 1, 2016 ... There is actually no strict definition of what a moon is, but there are some commonalities between those objects considered moons, also called ...