Cases of word usage

1) the planet on which we live (earth)

2) (in ancient Rome) the ruler of gods and men; the largest planet of the solar system (jupiter)

3) (in Roman myth) the god of war; the planet fourth in order of the sun (mars)

4) the planet farthest from the Sun (pluto)

5) a small body moving round a planet; an artificial object put in orbit round a planet etc (satellite)

6) the large planet with many rings round it (saturn)

7) the planet seventh in order from the Sun (uranus)