because the sun likes it that way
There are only eight planets in our solar system.
There are only 8 planets in this solar system
there are 5 planets in the solar system which have moon and the planets are earth, mars,jupiter,saturn,and uranus
We've only recently become aware that planets seem to be quite common, so the idea of "biggest solar system" has only come up recently. We have no way of knowing which solar system is "biggest".
nine planets till 2006 until Pluto was broken down so there was only eight planets in the solar system '
because that is just that
Only one planet is out of the solar system that is Pluto .
The only planet from our solar system that has been mentioned in the Stargate series is Earth. Other planets do not have stargates, since from the beginning the planets are not habitable.
Mercury and Venus. They are the only planets without a moon.
your question is worded awkwardly (& i know that's just wikianswers), but it sounds like you're asking "are planets only in our solar system" -- no
earth and only earth
Inside our solar system, only planet Earth has an atmosphere breathable to humans.