In order to not contaminate Mars with any possible life forms from Earth.
Microbes are very resilient, and theoretically can survive the voyage through space and the conditions on Mars.
NASA's Viking Mission to Mars was composed of two spacecraft, Viking 1 and Viking 2, each consisting of an orbiter and a lander. The primary mission objectives were to obtain high resolution images of the Martian surface, characterize the structure and composition of the atmosphere and surface, and search for evidence of life. Viking 1 was launched on August 20, 1975 and arrived at Mars on June 19, 1976.
The Viking Program, which created Viking 1 and Viking 2 space probes, was invented and launched by the United States.
The first spacecraft to land successfully on Mars was Viking 1 in 1975
Viking I
NASA's Viking 1 and Viking 2 landed on Mars in 1976.
Viking 1 was launched on August 20, 1975, and the second craft, Viking 2, was launched on September 9, 1975. Viking 1 entered Mars orbit on June 19, 1976. The Viking 1 touched down on the surface of Mars on July 20, 1976, and was joined by the Viking 2 on September 3.
NASA's Viking Mission to Mars was composed of two spacecraft, Viking 1 and Viking 2, each consisting of an orbiter and a lander. The primary mission objectives were to obtain high resolution images of the Martian surface, characterize the structure and composition of the atmosphere and surface, and search for evidence of life. Viking 1 was launched on August 20, 1975 and arrived at Mars on June 19, 1976.
Viking 1 was launched on August 20, 1975
Mars
Viking 1 was launched on August 20, 1975.
The Viking Program, which created Viking 1 and Viking 2 space probes, was invented and launched by the United States.
Viking 1 was launched on August 20, 1975, and the second craft, Viking 2, was launched on September 9, 1975. Viking 1 entered Mars orbit on June 19, 1976. The Viking 1 touched down on the surface of Mars on July 20, 1976, and was joined by the Viking 2 on September 3.
Viking 1 was launched on August 20, 1975, and the second craft, Viking 2, was launched on September 9, 1975
The first spacecraft to land successfully on Mars was Viking 1 in 1975
The viking rovers, vikings I and II.
viking 1and/or 2
Viking I