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  2. Viking 2 - Wikipedia

    en.wikipedia.org/wiki/Viking_2

    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 ).

  3. Radioisotope thermoelectric generator - Wikipedia

    en.wikipedia.org/wiki/Radioisotope...

    The plutonium-238 used in these RTGs has a half-life of 87.74 years, in contrast to the 24,110 year half-life of plutonium-239 used in nuclear weapons and reactors. A consequence of the shorter half-life is that plutonium-238 is about 275 times more radioactive than plutonium-239 (i.e. 17.3 curies (640 GBq)/g compared to 0.063 curies (2.3 GBq ...

  4. Viking lander biological experiments - Wikipedia

    en.wikipedia.org/wiki/Viking_lander_biological...

    A press commentary argued that, if there was life at the Viking lander sites, it may have been killed by the exhaust from the landing rockets. [60] That is not a problem for missions which land via an airbag-protected capsule, slowed by parachutes and retrorockets, and dropped from a height that allows rocket exhaust to avoid the surface.

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  8. Viking program - Wikipedia

    en.wikipedia.org/wiki/Viking_program

    The Viking 1 lander touched down on the surface of Mars on July 20, 1976, more than two weeks before Viking 2 ' s arrival in orbit. Viking 2 then successfully soft-landed on September 3. The orbiters continued imaging and performing other scientific operations from orbit while the landers deployed instruments on the surface.

  9. Jets vs. Vikings in London: Start time, how to watch for Week ...

    www.aol.com/jets-vs-vikings-london-start...

    What time is Jets vs. Vikings London game? Start time: 9:30 a.m. ET (6:30 a.m. PT) Date: Sunday, Oct. 6 (Week 5) The Jets and Vikings are set to kick off at 9:30 a.m. ET on Sunday morning. The ...