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Soviet Union tried to send an orbiter to Mars.
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Soviet Union launched this orbiter, but both U-69's were destroyed in blast off. They were using a new 3-stage type of rocket.
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Soviet Union's next attempt to Mars was destroyed in blast off when parts would not separate.
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USA cancelled Voyager program scheduled to launch in 1974 because of expense.
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Soviet Union launched both of these probes. The landing units did not work so the first mini-rovers sent to Mars did get a chance to work. Mars 3 orbiter was able to send images back to Earth. This gave information on gravity and the surface.
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Soviet Union sent orbiters 4 & 5 to orbit Mars and send images back, and 6 & 7 landing units to take surface pictures. Mars 4, 5, and 6 were successful, 7 was not.
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USA launched Viking 1 and a couple weeks later Viking 2. Both landing probes were successful. Sent back first colored pictures, temperatures, storms, pressure, and atmospheric gases.
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USA launched the Global Surveyor it began to end information back to Earth March 1999. The information sent back on topograghy, composition, and gravity.
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USA launched the Pathfinder as a base station with a roving probe to collect information. It was also testing the airbag landing system.
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The launch failed because of electrical failure.
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USA launched this probe, but it was lost September 23, 1999.
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USA sent this probe to study the southern part of Mars. On December 3, 1999 communication was lost.
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This orbiter was sent to send images of the surface. The images showed water and CO2 ice. The lander Beagle 2 didn't land properly.
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USA launched Mer A 6/10/2003 and B 7/7/2003 to collect samples A from a crater and B from a place that water was known to have had water.
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USA launched this lander nd it landed May 25, 2008.
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USA launched this unit to examine Mt. Sharp, a three mile high mount that could contain Mar's history
