If you want to see what Wikipedia has to say about this, I suggest the article entitled "Formation and evolution of the Solar System".
there are 9 planets
It was Nicolaus Copernikus. Type it into Wikipedia for more info.
these planets are small rock solid planets.
yes the planets are made of matter, all objects are made of matter
terrestrial are planets that are the inner planets since there are made up of rock. but on the other hand. the outer planets are the gas giants. or the outer planets. they are made up of various gasses.
Ah, there is so much to learn about the Solar System. It's very Easy to search Facts about Planets. You just go to Wikipedia on the Internet and type in "Planets"
there are 9 planets
You can look up information on the individual planets on Wikipedia. I am not sure the information is readily available as a ready-made list, so you may have to compile it yourself. The revolution around the Sun is listed as "orbital period".
the inner planets made up of rocks while the outer planets are made up of gases and liquids.
All the planets are made of "matter" and that has "mass".
It was Nicolaus Copernikus. Type it into Wikipedia for more info.
Because the inner planets are made of rock but the outer planets are made of gas(except for Pluto).
these planets are small rock solid planets.
Type your answer here... all planets are made of gasses
yes the planets are made of matter, all objects are made of matter
Go to Wikipedia and search the article "Extrasolar planets". It has links to several lists of planets and planetary systems.
terrestrial are planets that are the inner planets since there are made up of rock. but on the other hand. the outer planets are the gas giants. or the outer planets. they are made up of various gasses.