If we measure time by the solar year, would we calculate speed on another planet, like mars maybe, differently based on it’s solar year? Or would we use “Earth speed”?
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Time being relative has nothing to do with the solar year. Time is based on fundamental interactions in our universe, such as light. These change depending on speed and gravity, hence relativity.
Speed is also relative, in more ways than one, but not in the way you describe. First is galilean relativity, which basically says that as speed is always relative to something else. A rock in space alone has no speed – you need to compare it to another object to determine their speeds relative to one another. On earth, we usually compare to the ground, but of course that gives different results than comparing to the moon or to the inside of a car.
Einstein’s relativity takes the same warping from speed and gravity and applies them to both time and space, and since speed is based on time and space speed also warps.
If we measure time by the solar year, would we calculate speed on another planet, like mars maybe, differently based on it’s solar year? Or would we use “Earth speed”?
In: 0
Time being relative has nothing to do with the solar year. Time is based on fundamental interactions in our universe, such as light. These change depending on speed and gravity, hence relativity.
Speed is also relative, in more ways than one, but not in the way you describe. First is galilean relativity, which basically says that as speed is always relative to something else. A rock in space alone has no speed – you need to compare it to another object to determine their speeds relative to one another. On earth, we usually compare to the ground, but of course that gives different results than comparing to the moon or to the inside of a car.
Einstein’s relativity takes the same warping from speed and gravity and applies them to both time and space, and since speed is based on time and space speed also warps.
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