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Dr. James O'Donoghue
@physicsJ
At 99% the speed of light you could get to Mars in 30 seconds from *your* perspective, when Mars is (about) closest to Earth
Observers on Earth however, would see you take 3 minutes 30 seconds
THAT is time dilation, it really happens, this is a fundamental aspect of reality.
8:31 AM · Feb 2, 2021·Twitter Web App
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Dr. James O'Donoghue
@physicsJ
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49m
Replying to
@physicsJ
When something reaches light speed it doesn't experience time passing at all — it's the extreme end of time dilation. If you left Earth and could somehow accelerate to near light speed, you could navigate the cosmos in far less time, but everyone back home would be aging...
Dr. James O'Donoghue
@physicsJ
·
49m
... e.g. at 99.9% light speed it would take you about 73 days to reach the nearest star Proxima Centauri (4.247 light years away), but by the time you get there everyone on Earth would have aged 4 years and 90 days
Dr. James O'Donoghue
@physicsJ
·
46m
Why not have a go yourself? Here's an online calculator, just enter the speed and see how much time is reduced for you.
The time elapsed for you the traveler will return as a percentage https://emc2-explained.info/Dilation-Calc/#.YBl5y-gzb-g
Dr. James O'Donoghue
@physicsJ
·
45m
So clearly
@30SECONDSTOMARS
is traveling at 99% the speed of light
The end
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