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Why are the inner planets so much smaller then the gass giant outer planets?
They believe that the inner planets had gases at one point in time, but the sun burned them away.
How much time does it take for the planets to complete one revlution around the sun?
Each planet has a different time phase.
How large is the orbit of a comet?
It varies, from one comet to another. Some may go all the way to the Oort cloud. Others have been trapped by one of the outer planets, and don't go much beyond the outermost planets.
Which planets have not been visited by a spacecraft?
Depends on whether you say Pluto is a planet or not. If you say it isn't, then there are no planets that haven't been visited by a spacecraft. If you say it is, then there is one that hasn't been visited yet, but one is on the way.
What would happen if the sun was the size of a city?
Our solar system might have been totally different to the the one we have. The sun has gravitational forces that pull the planets while they revolve around it. If the sun was smaller, then the planets would have much smaller too. The temperatures generated by the sun on the planets might not have been sufficient to sustain life either.
How much planets are in earth?
The Planet Earth is ONE planet.
The solar system is made up of how many planets?
There are eight planets. Pluto, formerly classed as a planet, has been reclassified and is now one of three dwarf planets.
What is the difference between planets that rotations time are shorter than earth to planets rotation time that are longer than earth?
The outer planets all rotate faster than the inner planets. Each of them has a rotational period shorter than an Earth day. All of the inner planets have rotational periods longer than one Earth day. The outer planets are mostly made up of hydrogen, helim, and ice, and they are much larger than the inner planets which are mostly iron and various types of rock.
What dwarf planet comes after Eris?
Of the five currently recognised Dwarf Planets, Eris is the furthest one away from the sun on average. Sedna is an object orbiting much further out, but it has not been confirmed as a dwarf planet, partly as it is unknown at this time if it is near sperical in shape.
Where in space did the Daleks hide 27 planets?
They put the planets one second out of sync with the rest of time, at a place called the Medusa Cascade.
Is their any life on any of the planets?
Well, certainly no intelligent life, anyway. (The only known life at this time is on Earth, which is one of the planets.)
How long have the planets exist?
The planets in our Solar System have existed pretty much as long as the Solar System - about 4.6 billion years. Planets in other, older, solar systems may have existed quite a bit longer - almost as long as the Universe (which is 13.8 billion years old).
