Astronomy 101: From the Sun and Moon to Wormholes and Warp Drive, Key Theories, Discoveries, and Facts about the Universe (Adams 101 Series)

by Carolyn Collins Petersen

Mercury Facts Closest point to Sun: 46 million kilometers (28.5 million miles) Most distant point from Sun: 69.8 million kilometers (43.3 million miles) Length of year: 88 Earth days Length of day: 59 Earth days Tilt of axis: 0.0 degrees Gravity: 0.38 Earth’s gravity