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Sol (borrowed from the Latin word for sun) is a solar day on Mars; that is, a Mars-day. A sol is the apparent interval between two successive returns of the Sun to the same meridian (sundial time) as seen by an observer on Mars. It is one of several units for timekeeping on Mars. A sol is slightly longer than an Earth day.
The basic time periods from which the calendar is constructed are the Martian solar day (sometimes called a sol) and the Martian vernal equinox year.The sol is 39 minutes 35.244 seconds longer than the Terrestrial solar day, and the Martian vernal equinox year is 668.5907 sols in length (which corresponds to 686.9711 days on Earth).
Numerically, the Mars Sol Date is defined as MSD = (Julian Date using International Atomic Time − 2451549.5 + k)/1.02749125 + 44796.0, where k is a small correction of approximately 1 ⁄ 4000 day (22 s) due to uncertainty in the exact geographical position of the prime meridian at Airy-0 crater. [citation needed]
From one day to the next, the view of the Moon would change considerably for an observer on Mars than for an observer on Earth. The phase of the Moon as seen from Mars would not change much from day to day; it would match the phase of the Earth, and would only gradually change as both Earth and Moon move in their orbits around the Sun. On the ...
MarsDials were placed on the Spirit and Opportunity Mars rovers, inscribed with the words "Two worlds, One sun" and the word "Mars" in 22 languages. [1] The MarsDial can function as a gnomon, the stick or other vertical part of a sundial. [2] [3] The length and direction of the shadow cast by the stick allows observers to calculate the time of ...
Following the re-evaluation of the Sol 80 event as a marsquake, a re-evaluation of the Sol 53 event showed that it was unique among all Viking daytime recorded waveforms and the only one with a waveform with a rapid rise time and duration similar to Sol 80. Consequently Sol 53 was identified as a marsquake.
Taylor Swift is giving fans a glimpse inside her much-talked-about Eras Tour "cleaning cart.". On Wednesday, Dec. 11, Swift, 34, shared a carousel of photos on Instagram from her time onstage ...
The rover then passed the craters "Alvin" and "Jason", and by Sol 387, approached a "crater triplet" on its way to Vostok Crater. Along the way, Opportunity set a distance record for one-day travel by either rover: 177.5 meters (582 ft), on sol 381 February 19, 2005. On Sol 387 (February 26, 2005), the rover approached one of the three craters ...