We do know that there are volcanoes on other planets, including Mars, Venus, Jupiter, Mercury and others. read more
We do know that there are volcanoes on other planets, including Mars, Venus, Jupiter, Mercury and others. We haven't actually been to other planets yet (except Mars) so we aren't absolutely certain about how they form - but presently most planets don't seem to show the same kind of crustal structures Earth has (tectonic plates). read more
Volcanoes on Other Planets. by Kathy Svitil: Just as it has on Earth, volcanism has played a powerful role in shaping other worlds in our solar system. "Venus, for example, is covered with volcanoes, and many of them are clearly geologically very young," says Alfred McEwen, a planetary scientist at the University of Arizona. read more