they are all in their orbit

Sun: he is saying sun puns

Moon: he is trying to protect earth from the asteroids

Earth and Mars: they are playing asteroid dodgeball

Venus: he is just orbiting

Mercury: he is just hanging out with the sun

Jupiter: he is being a smart butt

Uranus: he is complaining about his name

Neptune: he is being a looney

Saturn: he is admiring his rings

Pluto: he is existing all the way in the back