The moon, of course, because it revolves around the Earth.
The moon is the natural satellite of Earth, visible in the sky at night as a bright or crescent-shaped object. It orbits the Earth and reflects light from the sun.
The sun and the moon are not planets. The sun is a star and the moon is a natural satellite. The brightest planet in Earth's sky is Venus.
Sputnik was the first satellite to orbit the Earth. It was Russian and transmitted a radio signal. It is possible that a earlier satellite could be in orbit, without any communications this would be the same as a cannon shell etc. So long as an object can reach orbit it will constantly drop towards the planet and because the planet is round the object will rotate around being pulled by gravity
A satellite is an object that moves across the sky in minutes. Satellites are man-made objects that orbit around Earth and can be seen in the night sky as they reflect sunlight.
The Moon is the closest object in space to Earth. Earth's moon is of particular importance to us because it is the closest object to Earth in space. And it is the only extraterrestrial object that has been visited by astronauts.
A geostationary orbit is an orbit of the Earth that is circular, over the equator, and at the right distance to have a period of 24 hours. A satellite in such an orbit appears to hang motionless, always at the same point in the sky Anything else is a non-geostationary orbit. A satellite in one of those appears to move in the sky, so that if you want to communicate with it, you need a movable dish.
what keeps planet earth from fallin out of the sky
An example of the moon is the disk or crescent of light you see in the night sky. The largest satellite of Earth. Any natural satellite of a planet. (literary) A month, particularly a lunar month.
Venus is the brightest object in the night sky other than the moon and the brightest object that appears as a starlike point. As a result it is often the first starlike object seen in the evening or the last one seen in the morning depending on where it is relative to Earth at the time.
Jupiter is the outer planet that can be seen from Earth without the aid of a telescope. It is the fourth brightest object in the sky and is visible to the naked eye.
Planet Earth - 2006 Eye in the Sky was released on: USA: March 2006
That happens when the satellite enters Earth's shadow.