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Schematic of the Viking Lander Biological Experiment System. In 1976 two identical Viking program landers each carried four types of biological experiments to the surface of Mars. The first successful Mars landers, Viking 1 and Viking 2, then carried out experiments to look for biosignatures of microbial life on Mars. The landers each used a ...
The Viking 2 mission was part of the American Viking program to Mars, and consisted of an orbiter and a lander essentially identical to that of the Viking 1 mission. [1] Viking 2 was operational on Mars for 1281 sols (1,316 days ; 3 years, 221 days ).
Viking expansion was the historical movement which led Norse explorers, traders and warriors, the latter known in modern scholarship as Vikings, to sail most of the North Atlantic, reaching south as far as North Africa and east as far as Russia, and through the Mediterranean as far as Constantinople and the Middle East, acting as looters, traders, colonists and mercenaries.
c. 1350: The Norse Western Settlement in Greenland was abandoned. 1354: King Magnus of Sweden and Norway authorised Paul Knutson to lead an expedition to Greenland which may never have taken place. c.1450–1480s: [2] The Norse Eastern Settlement in Greenland was abandoned during the opening stages of the Little Ice Age [broken anchor].
The Viking 1 Orbiter was inserted into Mars orbit on June 19, 1976, [8] and trimmed to a 1,513 x 33,000 km, 24.66 h site certification orbit on June 21. Landing on Mars was planned for July 4, 1976, the United States Bicentennial, but imaging of the primary landing site showed it was too rough for a safe landing. [9]
The Viking program launched Viking 1 and Viking 2 spacecraft to Mars in 1975; The program consisted of two orbiters and two landers – these were the second and third spacecraft to successfully land on Mars. In 1976, Viking 1 and Viking 2 touched down on the Martian surface. These landers were significantly larger than the Soviet Mars 3 lander ...
986: Norsemen settle Greenland and Bjarni Herjólfsson sights coast of North America, but doesn't land (see also Norse colonization of the Americas). c. 1000: Norse settle briefly in L'Anse aux Meadows in Newfoundland. [4] c. 1450: Norse colony in Greenland dies out.
The Norse settlements on Greenland lasted for almost 500 years. L'Anse aux Meadows, the only confirmed Norse site in present-day Canada, [5] was small and did not last as long. Other such Norse voyages are likely to have occurred for some time, but there is no evidence of any Norse settlement on mainland North America lasting beyond the 11th ...