First, I'm going to point out everything that's wrong with kagome9874's answer.
"well planets you can actually stand on"
This isn't always true. Some planets have very unstable surfaces which would not be able to support someone standing on them, they would simply crumble under the pressure.
"stars you can only see"
This is almost true... Stars are so distant that the light we see has traveled millions of lightyears, so if you were to chase a star, statistically speaking, you would probably never reach it, however, it is physically possible to go to a star, however you can't exactly touch it because you would melt/burn. Furthermore, our sun is a star, and you can touch that (but you'd die).
"you possible mean moon because there is only one moon"
WRONG! Lots of planets have at least one moon, some planets multiple moons. Granted some have no moons, but Earth isn't the only one with a moon. Earth has one moon, Mars has 2 moons, Jupiter has roughly 63 moons (there's debate as to whether there's more or not), Saturn has roughly 61 (also under debate), Uranus has 27, Neptune 13, Even Pluto has 3.
"and the moon only you can see at night"
Again, wrong! The moon can be see during the day all the time, especially during a solar eclipse.
"you have to be in space to see planets"
Have you ever heard of a telescope?
A planet is a large non-satellite celestial body that is in orbit around a star.
A star is a celestial body of hot, burning gases that radiates thermal energy and is derived from thermonuclear reactions from within.
A moon is a natural satellite celestial body that is in orbit around a planet.