... Because the ranging data to the Viking landers on Mars is so precise, a very good limit on the vacuum density is obtained: rho(vacuum) < 2*10 -19 gm/cc . ...
... NASA's Viking Mission to Mars was composed of two spacecraft, Viking 1 and Viking2, each consisting of an orbiter and a lander ... Viking2 was launched September 9, 1975 and entered Mars orbit on August 7, 1976. ...
... 2.98 Cranberry Club 2.96 Aron-Rosa 2.96 Torpedo Teams 2.87 Awkward 2.85 Sigma 2.80 ... 2.49 Major 2.48 Scientific Diamond 2.46 Carrotti with a Twist 2.45 Mafia Club 2.45 ...