1.   But that betrays a terribly parochial notion of what giant planets are like.

2.   That our lovely, blue planet is not a popular tourist attraction for extraterrestrials.

3.   The entire planet is fluid, like a star.

4.   The giant planets are, in fact, warm inside.

5.   The planet Pluto is comparable in size to our Moon.

6.   The planet Pluto is comparable in size to the Moon.

7.   The planet Saturn is not completely spherical.

8.   He thinks motherhood is glamorous - what planet is he on?

9.   Early astronomers thought that our planet was the centre of the universe.

10.   This is a major achievement because, in relative terms, planets are very small and old not emit light.