A satellite orbiting around the earth was

The earth ____ around the sun.A、revolvedB、revolvesC、is revolvedD、was revolved

The Moon and most artificial satellites travel around the Earth in elliptical paths．A.wave

Researchers cannot （) the possibility that Earth may one day run out of its orbit.

The long-awaited Hubble Space Telescope, ______ to orbit the Earth next March, will observ

In recent years, a number of communication satellites ______ into orbit about the earth.A．

A satellite 【orbiting】 around the earth was launc