An average day on the planet Mars is 24 hours and 36 minutes (in terrestrial terms), while the planet taken 587 terrestrial days to revolve around the sun. The planet has been known to mankind since its earliest days. Many early civilizations often referred to it as the "red one", as it looked like a red star with the naked eye. When humans finally got a good look at the planet, it was discovered that the planet had clouds, oceans and deserts.