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  2. Viking lander biological experiments - Wikipedia

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

    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 robotic arm to pick up and place soil samples into sealed test ...

  3. Viking program - Wikipedia

    en.wikipedia.org/wiki/Viking_program

    The Viking landers used a Guidance, Control and Sequencing Computer (GCSC) consisting of two Honeywell HDC 402 24-bit computers with 18K of plated-wire memory, while the Viking orbiters used a Command Computer Subsystem (CCS) using two custom-designed 18-bit serial processors. [32] [33] [34]

  4. Lander (spacecraft) - Wikipedia

    en.wikipedia.org/wiki/Lander_(spacecraft)

    Three other landers, Mars 2 in 1971 and Mars 5 and Mars 6 in 1973, either crashed or failed to even enter the planet's atmosphere. All four landers used an aeroshell-like heat shield during atmospheric entry. Mars 2 and Mars 3 landers carried the first small skis-walking Mars rovers, PrOP-M, that did not work on the planet.

  5. List of Mars landers - Wikipedia

    en.wikipedia.org/wiki/List_of_Mars_landers

    List of sub-landers onboard Mars landers S.No Sub-Landers Type Lander Slot Launch Date Mass (kg) Status References 1. PrOP-M: Rover Mars 2 19 May 1971 4.5 Failure [3] [4] 2. PrOP-M: Rover Mars 3 28 May 1971 4.5 Not deployed [4] [5] 3. Mars 96: Penetrator Mars 96 16 Nov 1996 88 Failure [11] 4. Deep Space 2: Penetrator Mars Polar Lander 03 Jan ...

  6. Viking 1 - Wikipedia

    en.wikipedia.org/wiki/Viking_1

    Viking 1 was the first of two spacecraft, along with Viking 2, each consisting of an orbiter and a lander, sent to Mars as part of NASA's Viking program. [2] The lander touched down on Mars on July 20, 1976, the first successful Mars lander in history.

  7. List of missions to Venus - Wikipedia

    en.wikipedia.org/wiki/List_of_missions_to_Venus

    Global topographic map of Venus, with all probe landings marked (red: returned images; with additional black dot: analyzed samples). There have been 46 space missions to the planet Venus (including gravity-assist flybys).

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