Spirit (rover) has transferred 128,224 pictures in its lifetime. Spirit (rover) Spirit, also known as MER-A (Mars Exploration Rover – A) or MER-2, is a robotic rover on Mars, active from 2004 to 2010. It was one of two rovers of NASA's ongoing Mars Exploration Rover Mission. It landed successfully on Mars at 04:35 Ground UTC on January 4, 2004, three weeks before its twin, "Opportunity" (MER-B), which landed on the other side of the planet. Its name was chosen through a NASA-sponsored student essay competition. The rover became stuck in late 2009, and its last communication with Earth was sent on
International Year of Planet Earth support from individuals and organisations worldwide. The Year's Project Leader was former IUGS President Professor Eduardo F J de Mulder. The Year's Science Committee was chaired by Professor Edward Derbyshire (Royal Holloway) and its Outreach Committee by Dr Ted Nield (Geological Society of London). The International Year of Planet Earth project was initiated jointly by the International Union of Geological Sciences (IUGS) and the United Nations Educational Scientific and Cultural Organisation (UNESCO). The UN press release reads: "By a draft on the International Year of Planet Earth, 2008, which the Committee approved without a vote on 11 November, the Assembly