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bongtower – viking 1,2 كلمات اغاني

since the mariner 4, 6, 7, and 9, the united states succeeded in exploring mars. on july 14_15, 1965, mariner 4 made its first successful flyby around mars and became the first sp_cecraft to take close_up images of another planet. in 1969, the mariner_6 and mariner_7 sp_cecraft were the first to study the composition of the mars atmosphere using spectroscopic techniques and the temperature of the planet’s surface. on november 14, 1971, mariner _ 9 entered mars orbit and became the first artificial satellite of another planet. the sp_cecraft continued to explore the planet. in the following years, its data and surface images became the basis for the choice of landing sites for the “viking” robotic sp_ce probes series
in order to explore the surface of mars, on august 20 and september 9, 1976, nasa successfully landed two identical sp_cecraft, viking 1 and viking 2. the sp_ce probes were the first to have successfully taken photographs from the surface of mars. they carried out experiments to determine the gas composition of the planet measured atmospheric pressure and temperature and compiled an atmospheric density profile. they also took soil samples for _n_lyzing if there was the presence of life. experiments revealed relatively high chemical activity of the soil, but they could not find unambiguous traces of the vital activity of microorganisms
the duration of the viking research program was planned to be about 3 months, but each sp_ce probe worked much longer _ from 4 to 6 years

- bongtower

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