13.12.2015 · On Mars, a solar day lasts 24 hours, 39 minutes, and 35 seconds. Rounding that out, we say that a day here on Earth works out to an even 24 hours while on Mars, a day lasts 24 hours and 40 minutes.

This yields a conversion factor of 1.02749125170 days/sol. Thus Mars's solar day is only about 2.7% longer than Earth's. The term sol is used by planetary scientists to refer to the duration of a solar day on Mars. The term was adopted during the Viking project in order to avoid confusion with an Earth day.

Martian New Year. On May 5, 2017, Mars passes solar longitude 0 as the Sun crosses the equator on Mars. This is the vernal equinox, and was chosen by planetary scientists as the start of a new year A Mars year is 687 Earth days. This is year 34 on Mars.

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The martian year is 687 earth days, or nearly 2 earth years. Since the martian day is a little longer than an earth day, the martian year is only about 669 martian days in length.

Martian "days" one rotation are slightly longer than Earth's, lasting about 24.66 Earth hours. As it orbits further from the Sun, its "year" one revolution around the Sun takes about 687 Earth.

At this distance, and with an orbital speed of 24.077 km/s, Mars takes 686.971 Earth days, the equivalent of 1.88 Earth years, to complete a orbit around the Sun.

Here is how to find the answer in mathematical steps: We first have to find out how many earth hours 355 Martian days is. Since a Martian day called a sol is 24.6 hrs long, we have to multiply.

This leads to the Martian year being about two Earth years long – 686.971 Earth d ays to be exact, which works out to 668.5991 Martian days or Sols. As a result, longer days and longer nights.

Unit Descriptions; 1 Sol: 1 Sol is a martian solar day, one full rotation of Mars from the perspective of the Sun. Approximately 88775.24409 seconds or 24 hours, 39 minutes, 35.24409 seconds; slightly variable due to orbital eccentricity.