There are 7 main classification of Planets. They are classified into the following groups;
* Inferior Planets * Superior Planets * Inner Planets * Outer Planets * Terrestial Planets, * Jovian Planets * Gas Giants
to explore many different planets, galaxies, comets, possible planets we can live on, etc.
they can orbit or rotate around in space
Space
Many kinds. their are Lander that crash into planets, orbiters orbit planets, rovers move and study the planet, and deep space probe fly away to study the Universe.
you can find many things like stars, galaxies, comets, planets
Because Planets are one of the only types of celestial bodies able to fill space, and they are being held in space by gravity. if you want a scientific answer, the big bang would be the reason planets are in space. if you want a religious answer: God put them there.
There are mountains on planets in space but there is no number on how many.
Comet, asteriod, planets, sun, etc.
230
Space is wonderful place with many marvelous planets out there.
About 4.5 billion.
it was created by many stars and planets,and space
If they aren't in space, then where else can they be?
to explore many different planets, galaxies, comets, possible planets we can live on, etc.
they can orbit or rotate around in space
Astronomy is all about the things in outer space and planets are in outer space.
The planets that have the most space between them are mercury and Pluto.