1.   And Jupiter has twelve moons.

2.   Do all the planets have moons?

3.   Astronomers had suggested that perhaps Mathilde had a moon of its own slowing it down.

4.   I could have had the moon if it was accessible.

5.   No one can say if they have moons.

6.   Thus, if the newfound planets have moons, chances are those could make ideal habitats for life.

7.   Uranus had been believed to be the only planet not to have such moons.

8.   But Jupiter and Saturn have moons, so maybe the proposed giant planets around the two distant stars do, too, Williams said.

9.   Jupiter, Saturn and Neptune were already known to have irregular moons, which circle them in highly elliptical or tilted orbits.