Jupiter
Venus is closest to earths planet size.
Mercury is earths brother planet because Venus is earths sister planet.
It is Venus.
It has no solid surface. It would hold 9 and a half earths on its face! Looks a bit like a squished ball.
9.8
Core
I believe there are because were not the only planet
Jupiter is much larger than the planet Earth, so it would not fit into Earth even once. Conversely, 1300 Earths can fit inside Jupiter.
Yes Earths Moon is a rocky planet
Venus is known as Earth's sister planet.
venus
Venus.