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Sojourner Rover
Sojourner landed in July 1997 and communications were lost in September of that year. Spirit landed in January 2004, and is still functioning but it is stuck in sand. But data is still collected from it. Opportunity also landed in January 2004 and it still functional.
Curiousity Rover You can know more about it at Wikepedia, the free encyclopedia
NASA's Spirit rover landed on Mars, January 4, 2004. 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 March 22, 2010.
The Sojourner Rover landed on Mars on July 4, 1997.
curosity
Sojourner Rover
Curiosity is the name given to the latest Mars rover, which landed on the red planet on August 6, 2012.
On Mars...
Sojourner landed in July 1997 and communications were lost in September of that year. Spirit landed in January 2004, and is still functioning but it is stuck in sand. But data is still collected from it. Opportunity also landed in January 2004 and it still functional.
the mars rover
Spirit Rover
Curiousity Rover You can know more about it at Wikepedia, the free encyclopedia
There are 4 rovers that have have successfully landed on Mars:Sojourner, which landed in 1997Spirit, which landed in 2004Opportunity, which landed in 2004 three weeks after Spirit and is still operationalCuriosity, which landed in 2012 and is still operational
Mars Exploration Rover
The first rover landed on Mars on July 4, 1997.
The Mars Exploration Rover Opportunity landed on Mars during 2004