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Originally Posted by Sam5
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Originally Posted by Kebsis
Since the Earth and Mars orbit the sun at different rates (they do, right?) wouldn't an astronaut that goes to Mars encounter some of the strange relativistic effects of being there? Like when they got back wouldn't less time have passed for them then for us?
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Their atomic clocks will tick a little faster on Mars than on the earth, but they won’t notice any biological age difference. Anyway, humans go by thermodynamic time, not atomic time. I assume they will be in nice warm space suits while on Mars. The orbit speed around the sun doesn’t have anything to do with this. |
Note to Kebsis: Sam5's views do not represent the prevailing view of the scientific community.
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I see, so how fast abouts would you have to be moving before you noticed any difference?
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Depends what you mean by "noticed." For an atomic clock, just going into orbit produces noticeable time dilation. To notice on a wristwatch, you'd need a decent fraction of the speed (10%? 30%? not really sure though) of light for a while few months. To notice in terms of biology, ie. going on a 2 year trip and coming back to find your newborn baby is a teenager, that would require a high fraction - more than 90% for those two years (your time).
Maybe someone else can quantify it better for you though.