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Because of the proximity of the Mars moons to Mars, any mission to them may also be considered a mission to Mars from some perspectives. Past missions Three missions to land on Phobos have been launched; the Soviet Phobos program in the late 1980s saw the launch of Phobos 1 and Phobos 2 , while the Russian Fobos-Grunt sample return mission was ...
Deployed by the Mars Express; lost for 11 years and imaged by NASA's MRO in 2015 [28] 2003-022C: Mars Exploration Rover-A "Spirit" NASA: 4 January 2004 – 22 March 2010 rover success became stuck in May 2009; then operating as a static science station until contact lost in March 2010 2003-027A: Mars Exploration Rover-B "Opportunity" NASA
First polar orbit around the Sun. First mission to survey the space environment above and below the poles of the Sun. USA (NASA) ESA Ulysses [43] 13 September 1992: First spacecraft to map Venus in its entirety. USA (NASA) Magellan [44] 22 March 1995: Record longest duration spaceflight to date (437.7 day by Valeri Polyakov). Russia Mir: July 1995
Extra-close oppositions of Mars happen every 15 to 17 years, when we pass between Mars and the Sun around the time of its perihelion (closest point to the Sun in orbit). The minimum distance between Earth and Mars has been declining over the years, and in 2003 the minimum distance was 55.76 million km, nearer than any such encounter in almost ...
Montage of planets and some moons that the two Voyager spacecraft have visited and studied. It is the only program that visited all four outer planets. A total of nine spacecraft have been launched on missions that involve visits to the outer planets; all nine missions involve encounters with Jupiter, with four spacecraft also visiting Saturn.
Then, after intercepting Mars, it must change its speed by another 2.3 km/s in order to match Mars' orbital speed around the Sun and enter an orbit around it. [12] For comparison, launching a spacecraft into low Earth orbit requires a change in speed of about 9.5 km/s.
Launched in 1978, it was the first spacecraft to be put into orbit around a libration point, where it operated for four years in a halo orbit about the L 1 Sun–Earth point. After the original mission ended, it was commanded to leave L 1 in September 1982 in order to investigate comets and the Sun. [21] Now in a heliocentric orbit, an ...
Launch of Mariner 1 in 1962. The Mariner program was conducted by the American space agency NASA to explore other planets.Between 1962 and late 1973, NASA's Jet Propulsion Laboratory (JPL) designed and built 10 robotic interplanetary probes named Mariner to explore the inner Solar System – visiting the planets Venus, Mars and Mercury for the first time, and returning to Venus and Mars for ...