All spacecraft do not carry people...
Satellites and space probes are spacecraft that travel, without without people.
Some of these satellites are used to study space.
Whereas others are used to carry phone messages and telephone pictures around the world.
Space probes are robots controlled by computers, on the Earth.
The first of these were the lunokhod robot rovers, which landed on the Moon in 1970 and 1973.
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| Lunokhod 1 mockup with major sizes and instruments shown. Courtesy of Lavochkin Association/Roskosmos. |
The US Pathfinder probe reached Mars on 4th July,1977.
Although the mission was planned to last from a week to a month, the rover operated successfully for almost three months. Communication failed after October 7, with a final data transmission received from Pathfinder at 10:23 UTC on September 27, 1997.
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| US Pathfinder Probe Credit.: NASA Mars Exploration Program |
Sojourner was the wheeled robot vehicle, which explored the surrounded area.
Pathfinder and Sojourner operated for 83 days and took more than 16,000 photographs and stunning images of the surface of the 'Red Planet'.
Funfact:-
The probe to land on Mars was Viking 1, in 1976.
It sent back amazing pictures of to the surface of the planet but could move about like Sojourner.
Important Sources:-
Wikipedia
NASA Mars Exploration Program
Roskosmos
Lavochkin Association
Encyclopedia
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