The area between the planets, or between the stars, contain nothing.
Or almost nothing; the "vacuum of Space" actually does contain a few atoms per cubic meter of gas (generally hydrogen), dust or other matter. Between galaxies, scientists expect the amount of mass to be much lower, and in gaseous nebulas it is probably higher.
4=that would be a universe
The universe.
Planets do not technically need their respective stars, but stars keep planets in orbit and provide heat and light to the planets.
On the contrary! A star has planets, which circulate it. And planets have moons. Stars do not circle planets.
Uranus.
Dust, gas, dark matter, perhaps individual stars and planets.
4=that would be a universe
The universe.
No. That's precisely the main difference between planets and stars - that stars can have nuclear fusion, planets not.
Stars give off light whereas planets reflect light.
Planets orbit stars.
We do not know. So far, organic molecules have been located on planets and in distant stars, but this is not proof that organic life exists there.
stars, the planets have to get heat from stars
yes, there are the nebulae, black holes, and planets, but mostly the space in between the stars is nothingness
Planets do not technically need their respective stars, but stars keep planets in orbit and provide heat and light to the planets.
On the contrary! A star has planets, which circulate it. And planets have moons. Stars do not circle planets.
Planets and stars have gravity.