Spherical
no
gravity of course
All planets and stars are approximately spherical in shape, a shape formed under their own gravity. Most are `oblate` spheroids though, squashed spheres, since their rotation can cause them to `bulge` out at the equator if it is sufficient enough.
Planets orbit stars.
Gases and rocks that form together to form a bigger shape or size
Since all of the planets, and moons, and stars seem to have a spherical shape, it is possible that the universe may be a sphere.
On the contrary! A star has planets, which circulate it. And planets have moons. Stars do not circle planets.
Planets and stars have gravity.
The Solar System Makes the planets and the Stars.
Moons orbit planets. Planets orbit stars. Some stars orbit other stars, or orbit their mutual center of gravity. Stars orbit the center of the galaxy. Galaxies may orbit the center of the "galactic group".
No. Stars are like suns, around which planets may orbit.
None Stars are gas Planets are solid