Launching a few weeks behind its twin Viking 1, Viking 2 followed suit and flew as an orbiter-lander pair to enter Mars orbit. The landers then separated from the orbiters and descended to the planet’s surface. [3009 x 1426] via /r/spaceporn http://ift.tt/2xaWdWQ
via Tumblr http://ift.tt/2w2Yfa6
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