They have very minor gravitational effects. Not noticeable but can be calculated.
The other planets do have gravity.
Essentially none at all. The gravitational force of the Sun is so much more influential than the gravity of any other planet that we can ignore the influence of other planets.
The moon's effect on other planets is minimal compared to its influence on Earth. The moon's gravity can cause slight motions in the planets, but these effects are typically very small due to the planets' larger size and distance from the moon. Overall, the moon primarily affects Earth's tides and to a lesser extent, the movement of celestial bodies within our solar system.
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.
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.
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.
well some planets are bigger than the earth but from the inside earth is of course bigger than all of the other planets