Mercury

Mercury




 * Diameter = 4880 km (38% of Earth’s diameter)
 * Density = 5.4 g/cm3 (98% of Earth’s density)
 * closest planet to the sun
 * surface gravity is 38% of Earth’s gravity
 * circles the sun every 88 days, rotates on its axis every 59 days
 * at night the temperature can drop to as low as -173 oC