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  • The true meaning of Sol regarding time on Mars
    From the Wikipedia page on Martian timekeeping: The term sol is used by planetary astronomers to refer to the duration of a solar day on Mars [7] A mean Martian solar day, or "sol", is 24 hours, 39 minutes, and 35 244 seconds [6] “Sol” is often used as a direct replacement for “Day” when concerning Mars Mission duration for Mars missions is measured in Sols, so saying “Today is
  • Where can the term Sol used? - Space Exploration Stack Exchange
    3 Alright, I know that "Sol" is used on Mars to count days But is the sun called: "Sol"? And can you use that term on Earth as well? The reason for the question is that the term "sol" is used in two ways, but never clarified Because it also means the sun, and the sun is what time (day night) is based on on Earth as well as Mars
  • What is the right way to get Mars sol? - Space Exploration Stack Exchange
    Among the following two methods what is the right way to get the Mars sol date? Using this equation from Timekpeeing on Mars Wikipedia page MSD = (Julian Date using International Atomic Time - 245
  • Why is 90 sols a standard mission duration for robotic spacecraft on . . .
    Several robotic Mars surface missions have a planned mission duration of 90 sols I would like to understand why this specific mission lifetime is commonly used by mission planners Below is a non-
  • terminology - Has any other term been used for a solar day on a solar . . .
    For several reasons NASA needed to refer frequently and extensively to a Martian solar day, and "sol" became the nom du jour There have been remotely controlled rovers on the Moon as well, but I don't know in the Russian or Chinese if the corresponding word for month was used for convenience, or if a new term for Lunar day was coined for the
  • Does the moon have a name? - Space Exploration Stack Exchange
    Sun (along with its cognates throughout the Indo-European languages, including Sonne, zon, sol, soleil, etc ) is derived from a word meaning "shine" The Sun is that bright thing that shines, lighting up our world Moon is derived from the same root as month, ultimately deriving from a word meaning "measure"
  • How does time work on other planets? - Space Exploration Stack Exchange
    Interesting question! These are different, but somewhat related questions that you might find interesting: Where can the term “Sol” used? and The true meaning of Sol regarding time on Mars and Martian Names for the Year and Month Time Units and When did Curiosity land in the Martian Darian calendar?
  • Delta-V chart mathematics - Space Exploration Stack Exchange
    Could someone explain me the mathematics behind the Delta-V charts one can find on internet such as: Delta-Vs for inner Solar System (Image converted from source Wikipedia SVG) How are they created? Say I would like to make an estimation of the delta-v required for putting an object on low earth orbit, how should I proceed in order to calculate that amount regardless of the rocket
  • Maximum emergency speed of an astronaut moving on the moon
    I wondered whether an astronaut in a spacesuit might actually be faster For example, the low gravity may make it possible to perform long jumps, presumably at much higher speeds Would that be an option in an emergency situation, say, to render assistance to a fellow astronaut in distress (so that some elevated risk to oneself would be acceptable)? Which speed could be achieved? the-moon
  • What are these straps on these common pressure suits?
    Several popular space suits designs feature a strap running from the crotch up to the collar American Advanced Crew Escape Suit Soviet Russian Sokol(-KM) It's tied to a pulley that hangs off a steel





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