The solar system came about from the first formation of the sun (the centre), what was left became 'planets' and asteroids. All move around the sun at different rates.Putting it simply the solar...
Yes. Gravity is caused by mass; the more mass, the more gravity. (We're entirely ignorant about the how and the why, but at least we know some of the "what" about gravity.) Since the Sun has most of...
The inner system is Mercury, Venus, Earth and Mars. The inner system is all rocky planets because gas giants like Jupiter will "Melt" under that kind of temperature.