kidzsearch.com > wiki Explore:web images videos games
Astronomers usually use different words for the orbit of a planet around a star, and for the spin of a planet about its own axis. The motion in an orbit is called revolving, while the spin of a planet is called rotating. For instance, the Earth revolves around the Sun completing one revolution in one year, and it rotates about its axis completing one rotation in one day. But either word can be used.