Viking 1
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Viking 1 is the first of two spacecraft, along with Viking 2, each consisting of an orbiter and a lander, sent to Mars as part of NASA's Viking program. The lander touched down on Mars on July 20, 197
Lander shell (top) and orbiter
Large Strategic Science Missions Planetary Science DivisionViking 2 → Viking program
Viking aeroshell
Launch of the Viking 1 probe (August 20, 1975)
Exploration of Mars
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The planet Mars has been explored remotely by spacecraft. Probes sent from Earth, beginning in the late 20th century, have yielded a large increase in knowledge about the Martian system, focused prima
Viking 1
…the signal passing close to the Sun. Scientists found that the observed Shapiro delays of the signals matched the predictions of general relativity. Exploration of Mars List of missions to Mars…
Mars landing sites (16 December 2020)
Martian sunset, Spirit rover, 2005
Mars 1M spacecraft
The first close-up images taken of Mars in 1965 from Mariner 4 show an area about 330 km across by 1200 km from limb to bottom of frame.