Image of the meteorite 'Block Island' (IMAGE) Royal Astronomical Society Caption Image of "Block Island", an odd-shaped, dark rock on the surface of Mars, which is thought to be a meteorite. This object was imaged with the navigation camera on NASA's Mars Exploration Rover Opportunity on sol 1959 (July 28, 2009). Credit NASA / JPL-Caltech Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.