Planets orbit stars.
Galaxies/nebulae are at the top of the tree; each one contains several billion stars. Each star might have many planets orbiting around it, and planets can have many moons.
stars, the planets have to get heat from stars
Planets orbit stars, stars orbit a galaxy. Planets are not "on" anything. A lot of stars out there have planets - we are just finding out how many now that we have better techniques to find them. So probably all galaxies have at least some stars with planets.
No, just one - our sun. Our galaxy, on the other hand, contains between 100-400 billion stars.
A galaxy contains planets and a star system contains only stars.
Planets orbit stars.
Galaxies/nebulae are at the top of the tree; each one contains several billion stars. Each star might have many planets orbiting around it, and planets can have many moons.
stars, the planets have to get heat from stars
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.
Yes. There have been hundreds of planets discovered in other stars in the Milky Way. It has been estimated that the Milky Way likely contains hundreds of billions of planets.
The Solar System Makes the planets and the Stars.
A galaxy is a part of space that contains the planets stars dust comets asteroids and other particles.
Planets orbit stars, stars orbit a galaxy. Planets are not "on" anything. A lot of stars out there have planets - we are just finding out how many now that we have better techniques to find them. So probably all galaxies have at least some stars with planets.
An Astronomer is a scientist who studies the stars and planets.