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... missions in physics and astronomy program. Most important was Orbiting Solar Observatory Oso 7 (launched Sept. 29, 1971), "which carried into orbit a set of solar telescopes more powerful than any ... 6 Mar 7 1972 7 Mar 8 1972 8 Mar 9 1972 9 Mar 10 1972 10 Mar 11 1972 11 Mar 12 1972 12 Mar 13 1972 13 Mar 14 1972 14 Mar 15 1972 15 Mar 16 1972 16 Mar 17 ...

... reach Mars Nov. 13. ''(NASA Release 71-184)'' August 1971 August September 1971 September Sep 1 1971 1 Sep 2 1971 2 Sep 3 1971 3 Sep 4 1971 4 Sep 5 1971 5 Sep 6 1971 6 Sep 7 1971 7 Sep 8 1971 8 Sep 9 1971 9 Sep 10 1971 ...

... Astrogram reported. ''(ARC Astrogram, 11/24/71, 1)'' Mariner 9 and Soviet Mars 2 and 3 race to Mars was "exciting race for knowledge and the fame of exploration, exemplifying the ... 1971 October November 1971 November Nov 1 1971 1 Nov 2 1971 2 Nov 3 1971 3 Nov 4 1971 4 Nov 5 1971 5 Nov 6 1971 6 Nov 7 1971 7 Nov 8 1971 8 Nov 9 1971 9 Nov 10 1971 ...

... . ''( Goddard Space Flight Center GSFC SSR, 7/31/71; SBD, 7/19/71, 78; FBIS-Sov-71-137, 7/16/71, Ll )'' Findings on atmosphere of Mars from uv spectrometer observations made during NASA ... 1971 June July 1971 July Jul 1 1971 1 Jul 2 1971 2 Jul 3 1971 3 Jul 4 1971 4 Jul 5 1971 5 Jul 6 1971 6 Jul 7 1971 7 Jul 8 1971 8 Jul 9 1971 9 Jul 10 1971 10 Jul 11 1971 11 Jul 12 1971 12 Jul 13 1971 13 Jul 14 1971 14 Jul 15 1971 15 Jul 16 1971 16 ...

... lunar exploration, and manned voyages to Mars were discussed in article on earth, moon, and Mars. ''(Am 111, 2/71)'' U.S.S.R. issued 1971-1975 five-year plan with new emphasis ... 1971 January February 1971 February Feb 1 1971 1 Feb 2 1971 2 Feb 3 1971 3 Feb 4 1971 4 Feb 5 1971 5 Feb 6 1971 6 Feb 7 1971 7 Feb 8 1971 8 Feb 9 1971 9 Feb 10 1971 10 Feb 11 1971 11 Feb 12 1971 12 Feb 13 1971 13 Feb 14 1971 14 Feb 15 1971 15 Feb 16 1971 16 ...

... would be depleted in early August 1972, nine months after spacecraft went into orbit around Mars. Increased rate of consumption was due to circuit design error in attitude-control- system electronics ... 1971 May June 1971 June Jun 1 1971 1 Jun 2 1971 2 Jun 3 1971 3 Jun 4 1971 4 Jun 5 1971 5 Jun 6 1971 6 Jun 7 1971 7 Jun 8 1971 8 Jun 9 1971 9 Jun 10 1971 ...

... , traveling at 96 540 km per hr (59 987 mph). Spacecraft was expected to reach Mars' vicinity Nov. 13, collect atmospheric and surface data, and map 70% of Martian surface during ... 1971 August September 1971 September Sep 1 1971 1 Sep 2 1971 2 Sep 3 1971 3 Sep 4 1971 4 Sep 5 1971 5 Sep 6 1971 6 Sep 7 1971 7 Sep 8 1971 8 Sep 9 1971 9 Sep 10 1971 10 Sep 11 1971 11 Sep 12 1971 12 Sep 13 1971 13 Sep 14 1971 14 Sep 15 1971 15 Sep 16 1971 16 ...

... JPL , described mysterious yellow dust storm-greatest observed since 1956-that had developed on Mars Sept. 23 and 24 and was first detected through telescopes Sept. 26. Steinbacher said, " ... 1971 September October 1971 October Oct 1 1971 1 Oct 2 1971 2 Oct 3 1971 3 Oct 4 1971 4 Oct 5 1971 5 Oct 6 1971 6 Oct 7 1971 7 Oct 8 1971 8 Oct 9 1971 9 Oct 10 1971 ...

... released findings of U.S. authorities who met at Langley Research Center Aug. 16-20, 1971, to discuss detection of air and water pollution by remote sensing, especially from aircraft or ... 5 Mar 6 1972 6 Mar 7 1972 7 Mar 8 1972 8 Mar 9 1972 9 Mar 10 1972 10 Mar 11 1972 11 Mar 12 1972 12 Mar 13 1972 13 Mar 14 1972 14 Mar 15 1972 15 Mar 16 1972 16 Mar 17 ...

... surface 50 min; Mars 2 and 3 orbiting of Mars (entering orbits Nov. 27 and Dec. 2, 1971) and the first soft­landing of a capsule on Mars, by Mars 3 (Dec. 2, 1971) ; research of ... 5 Mar 6 1973 6 Mar 7 1973 7 Mar 8 1973 8 Mar 9 1973 9 Mar 10 1973 10 Mar 11 1973 11 Mar 12 1973 12 Mar 13 1973 13 Mar 14 1973 14 Mar 15 1973 15 Mar 16 1973 16 Mar 17 ...

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