A biosphere.
the sun earth and the remaining planets are roughly spherical in shape.
mars is a sphere and is rough
Earth's Moon has no planets, unless you consider Earth to be the Moon's planet. A planet is defined as an object revolving around the Sun that is large enough to form itself into a sphere from the force of gravity, and yet not be so large as to create fusion like the Sun. It also must clear its orbit of other dust and debris. A moon, on the other hand, is an object that revolves around a planet.
Ptolemy's view of the universe placed the sun, the other solar system planets, and the stars inside a huge rotating sphere centered a point in space close to the earth.
Earth's scientist have not found life on other planets to date.
sphere
One of the best example of terrestrial sphere is the earth. The 8 planets are also considered as the terrestrial sphere.
Luna (or the Moon).
The Sun and its planets are all basically spheres. The earth is an 'oblate sphere' - that it, it is flattened at the poles.
a sphere is called a sphere because , well , its just a other name for a ball such as the earth.
The sun is a sphere, while planets are generally spherical in shape due to gravity pulling their mass evenly in all directions. Some planets have slight deviations from a perfect sphere due to rotation or geological activity, but they are still predominantly spherical in shape.
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 celestial sphere is a theoretical imaginary sphere surrounding the Earth, on which all celestial objects are considered to be located. It is often thought of as a giant dome in the sky where the stars, planets, and Sun appear to be positioned.
Earth and the other planets are mostly made of rock.
the sun earth and the remaining planets are roughly spherical in shape.
Astronomers have found Earth-sized planets in other solar systems.