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A planet is an object that is:

1) Orbiting a star

2) Has a more or less spherical shape

3) Has no other objects in its orbit.

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16y ago

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What planet is made of mostly atmosphere?

None. By definition a rocky planet is mostly rock. Venus, by far, has the densest atmosphere of the terrestrial planets, but the planet itself is mostly rock and is similar in composition to Earth.


Why does Pluto not anymore considered as planet?

The definition of a planet was changed and it does not meet that definition.


Which planet has no rock?

the planet that has NO rock on it, is most likely Jupiter.


Is Venus' a rock planet?

Yes, venus is a rock planet


Is Mercury a planet or a rock?

Mercury is a planet made of rock and metal.


Does europa match the definition of a planet although it is a moon?

No. Europa does not meet the definition of a planet because it does not orbit the sun. It orbits the planet Jupiter.


What rocky planet is mostly made of atmosphere?

None. By definition a rocky planet is mostly rock. Venus, by far, has the densest atmosphere of the terrestrial planets, but the planet itself is mostly rock and is similar in composition to Earth.


What did the dwarf planet Ceres used to be called?

I have no idea good luck finding out man rock on dude


Which outer planet is all rock?

No outer planet that we currently know of is all rock. If this is a trivia/homework question the intended response is most likely either Mars or Pluto, but there are problems with each of these: Pluto is a dwarf planet, not a planet. This might be considered quibbling, but there's a more significant problem: using Pluto as the answer would require an unusually generous definition of the term "rock" (Pluto's average density of 1200 kg/m3 is too low for it to be rock; it's mostly made of ice). Mars IS definitely a planet, and it IS mainly rock, with some metals and just a little bit of ices; however, it's not an OUTER planet (Mars is the outermost of the inner planets).


Which planet has the most moons discovered by 2002?

Jupiter (or Saturn that depends on your definition of "moon" the rings of Saturn are composed of billions of chunks of rock and ice which each could be called a "moon" if you want to stretch the definition a lot...)


Is a inner planet gas or rock?

Rock.


Who sings planet rock?

More information about a Planet Rock song can be found online at the Planet Rock website. The website gives you information about the Planet Rock songs and the sample of songs.