The first of the two Mars rovers, dubbed the Spirit and Opportunity rovers after the two astronauts who died in 1969, has landed on an island in Indonesia.
The two rovers are part of the so-called Spirit and Orion crews, which have been on Mars since December 2011.
A team of about 30 scientists and engineers from the Jet Propulsion Laboratory in Pasadena, California, were involved in the operation.
The lander is called the Spirit, and it landed on the island of Borneo, Indonesia, on Saturday.
It will remain on the lander for another month and will take samples and take samples from the island, the US space agency said in a statement.
The rover is part of NASA’s Mars Science Laboratory programme, which aims to search for signs of life on Mars.
It is also expected to return some of its samples to Earth in 2023.
Spirit landed on Sunday after being deployed from Cape Canaveral Air Force Station, Florida, and was expected to be in place for the final time by Wednesday.
The landing was also expected “within the next few days”, a Nasa statement said.
The rovers have been used in the search for evidence of past life on Earth.
In September 2011, a crew of three Spirit rovers left Earth for the Red Planet.
They returned about 1,500 metres (4,000 feet) from the surface, before descending back to Earth.
On August 24, 2012, the rover landed on a volcanic island.
The island is about 1.2 kilometres (0.6 miles) wide, and is a small spot with about 200 people living there.
It has a crater, which scientists believe formed when lava poured down from a volcano in Indonesia, the Jet’s statement said, adding that the volcanic island is surrounded by mountains.