Gale Crater

Today's VIS image shows part of Gale Crater. Gale Crater forms a large natural repository for a lot of Martian geologic history. This ancient impact scar has a diameter of about 150 kilometers (90 miles) and lies close to where the cratered highlands drop off onto the northern lowlands in Elysium. Based on its size and state of preservation, scientists estimate Gale formed 3.8 to 3.5 billion years ago. What draws scientific interest most is a big mound of layered debris filling about a third of the crater's floor. Wrapping around the crater's central peak, the mound stands about 5.5 km (3.4 mi) higher than the northern crater floor and about 4.5 km (2.8 mi) above the southern floor. The mound's highest parts even rise somewhat higher than Gale's southern rim. Gale Crater is the home of the Curiosity Rover.