The Curiosity Rover, Now in Transit (IMAGE) Washington University in St. Louis Caption The Curiosity rover, which lifted off Nov. 26, 2011, will arrive at the Red Planet in August 2012. The rover, shown here during testing inside the Spacecraft Assembly Facility at the Jet Propulsion Laboratory in California, is about the size of a Mini Cooper and weighs roughly five times as much as the Spirit and Opportunity rovers. Credit NASA/JPL-Caltech Usage Restrictions Credit required 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.