The planets of our solar system are most definitely NOT all the same size.
Earths atmospheric size and composition is unique among all of the planets.
The Earth and Venus are pretty close to being the same size (about 5% difference), and Uranus and Neptune are also pretty close to the same size (about 4% difference). All of the other planets are different.
The Jovian planets are all much larger than Earth. See related link for a size comparison
No.
No. The Moon is large compared to Earth. Almost all other moons are much smaller relative to the planets they orbit.
Because not all planets rotate at the same rate that Earth does.
well the Earth is not exactly the same to other planets actually, it is the same because they're all parts of the solar system and they pretty much spin in the same direction but their features/characteristics are not much similar. Neither it is in size nor in appearance sooo....Hope this helps !!
In our own Solar System, Venus is of similar size to Earth. Mars is smaller, but Venus is pretty much the same size as Earth. However, its surface is extremely inhospitable, so could never be landed on by people. Mercury is much smaller than Earth, and all the others are a LOT larger! There are other stars in the galaxy that in recent years have been seen to have Earth-sized planets orbiting them. Some of these are gas planets, but others are solid and may possibly support primitive microscopic life-forms. More Earth-sized planets are being discovered all the time! Comment: Not many Earth sized planets have been discovered yet.
No. They are all different
All planets (in our solar system) have the same sun. All the planets rotate around the same sun that Earth rotates around.
Earth and Venus have very similar masses and sizes; all other planets are either significantly smaller or significantly larger than the Earth. Earth and Venus also are relatively close in terms of their distance from the sun; the orbits of all other planets are farther from the Earth's orbit, except for the closest planet, which is Mercury.