Do you have an irrational and overwhelming fear of Phobos smashing into Mars? You may not be alone… [0:25m]
What’s the facts?
Phobos is one of two irregularly shaped moons in orbit around Mars; the other is named Deimos. Phobos orbits once every 7 1/2 hours around Mars at a height of only 9377 kilometers (about 5800 miles) above the surface of Mars. In comparison, the Moon orbits once every 27 days at a height of 385,000 kilometers (about 239,000 miles). So Phobos is 40 times closer to Mars than the Moon is to the Earth, which might make a Martian claustrophobic! Incidentally, the name Phobos comes from the Greek god of fear!
Original air date 19 June 2009.