it is the only one we know about that contains life at the moment.
You can stand on Pluto and mars because they have a solid surface. You could NEVER stand on any of the other planets. They are made of gas, If you were stupid enough to stand on one of the other planets you would die once you get on it
The other planets do have gravity.
Since no one from Earth has visited another planet, and we have no indication that there is anyone on the other planets, Earth does not help other planets in any way. Why do you think there is something Earth does to help them- whoever them is.
The other type of planet is terrestrial, which is made up of mostly rock and metal. Terrestrial planets, like Earth, have a solid surface and a thin atmosphere compared to gaseous planets like Jupiter or Saturn.
Earth and the other planets are mostly made of rock.
Astronomers have found Earth-sized planets in other solar systems.
No, other planets are rotating at other speeds.
rotate
It is estimated that the Solar System is 4.6 billion years old including Earth and the other planets.
It's extremely unlikely that anyone alive today will ever stand on any planet other than Earth.
Earth's scientist have not found life on other planets to date.
Studying the earth helps scientists to understand other planets since the earth is part of the solar system. Scientists use the features of the earth to compare them with what other planets hold.