Physics – Optics
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sci...194.1277m&link_type=abstract
Science, vol. 194, Dec. 17, 1976, p. 1277-1283. Research supported by the Alfred P. Sloan Foundation and NASA.
Physics
Optics
16
Color Photography, Landing Sites, Mars Photographs, Mars Surface, Viking Lander 2, Atmospheric Optics, Extraterrestrial Life, Optical Thickness, Planetary Landing, Space Exploration, Viking Mars Program
Scientific paper
Viking 2 lander began imaging the surface of Mars at Utopia Planitia on September 3, 1976. The surface is a boulder-strewn reddish desert cut by troughs that probably form a polygonal network. A plateau can be seen to the east of the spacecraft, which for the most probable lander location is approximately the dirction of a tongue of ejecta from the crater Mie. Boulders at the lander 2 site are generally more vesicular than those near lander 1. Fines at both lander sites appear to be very fine-grained and to be bound in a duricrust. The pinkish color of the sky, similar to that observed at the lander 1 site, indicates suspension of surface material. However, the atmospheric optical depth is less than that at the lander 1 site. After dissipation of a cloud of dust stirred during landing, no changes other than those stemming from sampling activities have been detected in the landscape. No signs of large organisms are apparent at either landing site.
Arvidson Ray E.
Avrin Philip
Binder Alan B.
Carlston C. E.
Grenander S. U.
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