Mars landing site:

A June 2012 revision of the landing target area for Curiosity, the big rover of NASA's Mars Science Laboratory mission, reduces the area's size. It also puts the center of the landing area closer to Mount Sharp, which bears geological layers that are the mission's prime destination.

The larger ellipse in this image, about 12.4 miles (20 kilometers) by 15.5 miles (25 kilometers) shows what the target area was prior to revision. The smaller one, about 12 miles by 4 miles (20 by 7 kilometers), indicates the revised target area.

This oblique view of Mount Sharp is derived from a combination of elevation and imaging data from three Mars orbiters. The view is looking toward the southeast. Gale Crater is 96 miles (154 kilometers) in diameter. Mount Sharp rises about 3.4 miles (5.5 kilometers) above the floor of Gale Crater.

Stratification on Mount Sharp suggests the mountain is a surviving remnant of an extensive series of deposits that were laid down after a massive impact that excavated Gale Crater more than 3 billion years ago. The layers offer a history book of sequential chapters recording environmental conditions when each stratum was deposited.

Landing will be about 10:31 p.m. on Aug. 5, 2012, Pacific Daylight (early Aug. 6 Universal Time and Eastern Time). During a prime mission lasting nearly two years after landing, Curiosity will use 10 instruments to investigate whether this area of Mars has ever offered conditions favorable for life, including the chemical ingredients for life.