Core
Venus is closest to earths planet size.
Mercury is earths brother planet because Venus is earths sister planet.
It is Venus.
Yes, Earth's gravity pulls objects towards its center. The force of gravity between Earth and objects on or near its surface causes everything to be pulled towards the center of the planet.
9.8
I believe there are because were not the only planet
The center of the planet is called the "core."
Yes Earths Moon is a rocky planet
Venus is known as Earth's sister planet.
Jupiter
venus
Venus.