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A Martian year is approximately 668.6 sols, equivalent to approximately 687 Earth days [1] or 1.88 Earth years. The sol was adopted in 1976 during the Viking Lander missions and is a measure of time mainly used by NASA when, for example, scheduling the use of a Mars rover .
Summary of Mars mission clocks and sol counts Mission Ref. long. Clock offset Type Epoch (LT) Pathfinder (1997) 33.25°W AAT-02:13:01 LTST Sol 1 = MSD 43905 Spirit (2004) 165.01°E AMT+11:00:04 HLST Sol 1 = MSD 46216 Opportunity (2004) 15.28°W AMT-01:01:06 HLST Sol 1 = MSD 46236 Phoenix (2008) 126.65°W AMT-08:26:36 LMST Sol 0 = MSD 47776 ...
Seventeen episodes were filmed at these studios before they closed at the end of 1969. Production resumed at Pinewood Studios when studio space became available in June 1970, making UFO a 17-month-long production by the time the final nine episodes were completed. After the break, George Sewell (who played Colonel Freeman) and Gabrielle Drake ...
Distance of the outer limit of Oort cloud from the Sun (estimated, corresponds to 1.2 light-years) — Parsec: 206 265 — One parsec. The parsec is defined in terms of the astronomical unit, is used to measure distances beyond the scope of the Solar System and is about 3.26 light-years: 1 pc = 1 au/tan(1″) [6] [61] Proxima Centauri: 268 000 ...
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This is a list of the 27 longest spacewalks, also known as an extravehicular activity or EVA. "Agency" here refers to the organization under whose auspices the EVA was conducted (so a Swiss or Japanese astronaut would be listed under NASA if they wore NASA suits and were controlled by Mission Control Houston).
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The first satellites designed for long term observation of the Sun from interplanetary space were NASA's Pioneers 6, 7, 8 and 9, which were launched between 1959 and 1968. These probes orbited the Sun at a distance similar to that of Earth, and made the first detailed measurements of the solar wind and the solar magnetic field.