Many of these stars are likely to have planets circling around them.

There are nine planets circling the sun, including the earth.

In 1995, for the first time, we detected a planet circling a star other than our own sun.

No planets circled it, however, in its journey through space.

The sun, moon and other planets circled the Earth in a regular, perfect pattern.

A planet circling the sun has a certain amount of angular momentum.

And many - perhaps most - of those alien suns have planets circling them.

"There's a planet circling it," a crew woman added now.

Six planets circling six stars a few light years apart.

On one edge, a single planet circling a star blinked, indicating their current destination.