every planet
gravity is something that can affect the planets.
Gravity holds everything together in the galaxy. (planets)
yes it does
The effect is very small.
The planets' own gravity has made them spherical. Also there are other effects such as their ability to retain an atmosphere, etc. The Sun's gravitycauses the orbits of the planets.
You know that no planets actually orbit the earth right? ...?
Depending on the greater or less the mass is gravity's affect on the object is not applicable as gravity is a never ending motion which does nothing but keep objects intact on planets.
earths rotation around the sun
"Gravity" is responsible for the existence of planetary orbits, and for their shapes and periods. It's also the reason for the spherical shapes of the planets, and for the existence of atmospheres, in the case of those planets that have any.
Gravity keeps the planets in orbit around the sun and the stars and the stars in orbit around the center of the galaxy. Gravity also holds the stars together against their own internal pressure.
Planets have gravity because they have mass.
the sun holds 98% of the solar system.