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The length of time for Mars to complete one orbit around the Sun in respect to the stars, its sidereal year, is about 686.98 Earth solar days (≈ 1.88 Earth years), or 668.5991 sols. Because of the eccentricity of Mars' orbit, the seasons are not of equal length.
Extra-close oppositions of Mars happen every 15 to 17 years, when we pass between Mars and the Sun around the time of its perihelion (closest point to the Sun in orbit). The minimum distance between Earth and Mars has been declining over the years, and in 2003 the minimum distance was 55.76 million km, nearer than any such encounter in almost ...
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).
The average duration of the day-night cycle on Mars — i.e., a Martian day — is 24 hours, 39 minutes and 35.244 seconds, [3] equivalent to 1.02749125 Earth days. [4] The sidereal rotational period of Mars—its rotation compared to the fixed stars—is 24 hours, 37 minutes and 22.66 seconds. [4]
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With destructive, combative Mars ending an 11-week retrograde this February 23, there’s at least a slight chance that some of the chaos of the past couple months will start to dissipate.
Pluto completes the second orbit of the Sun since its discovery. 2435 March 3 At 19:11 UTC, Venus will occult Saturn. [42] 2442 October 23 At 09:43 UTC, Venus will occult Jupiter. [42] 2456 Triple conjunction Mars–Jupiter. 2475 Pluto's orbit brings it closer to the Sun than Neptune for the third time since its discovery. 2478 August 29
The Association of Lunar and Planetary Observers reports that you can expect it to be around 14.6 arcseconds in size and shine at a magnitude of -1.4, meaning it will outshine every star. (In ...