Methane
The force of gravity.
The force of gravity causes the moon to orbit the Earth, and the Earth to orbit the sun.
Gravity
The force of gravity.
Force? As in The Force from Star Wars? Or a gravitation force? Care to explain?
Yes, the Earth and Moon both exert a gravitational force on each other. This force is responsible for the Moon orbiting around the Earth.
while the earth is orbiting the sun the moon is orbiting the earth
The force that keeps the moon in orbit around the sun is the gravitational force between the sun and the moon. This force causes the moon to continuously fall towards the sun but its orbital motion prevents it from colliding with the sun.
The Moon is orbiting a planet; It is orbiting the Earth. The velocity /acceleration of the Moon and the gravitational pull between Earth and Moon are in balance, so the Moon remains orbiting the Earth. Similarly the Earth and Moon , as a binary system, orbit the Sun , and the acceleration and gravitational forces are in balance. So none of us collide.
One moon is orbiting Earth and that is called The Moon.
The moon. The earth is in orbit around the sun, but the moon goes with it, orbiting the earth directly and orbiting the sun indirectly.
There is no moon on Earth, but there is one orbiting it; we call it the moon.