But have you ever wondered what they get up to when we're not looking?
Meet 'The Planets' - a series of characters based on the nine Planets in the solar system, the sun, the moon and Halley's Comet.
Meet Eartha - a beautiful blue-green Planet desperate to slim down her curvy hills and mountains.
Meet Loony Moon - a sad little moon who hates his craters and who has a very dark side.
And meet Sam Sun - who thinks the whole solar system revolves around him and who has rampant solar wind problems.
Look out for the rest of The Planets series - coming soon!