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A comment on NASA says distant exoplanet could have rare water ocean, possible hint of life. Parent comment

Re:NASA says distant exoplanet could have rare water ocean, ... by kawzeg on Tuesday September 12, 2023 @06:35AM (#37479037)
Time dilation! Time is relative. For an outside observer, over 1000 years pass, but aboard the ship, much less time passes. There are calculators for this, e.g. at [0]. If you constantly accelerate at 1g, flip around at the halfway point and accelerate in the opposite direction for the rest of the journey, roughly 13 years would pass from the traveler's perspective.

This site also has a "Newton's universe" mode, which pretends that relativity doesn't exist. Interestingly, in that case you would take over 44 years!

[0]: https://www.omnicalculator.com/physics/space-travel?c=EUR&v=...

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Re:NASA says distant exoplanet could have rare water ocean, ... by konschubert on Tuesday September 12, 2023 @09:15AM (#37480677)
I am pretty rusty in special relativity, but IIRC, in the ship it basically seems like the distance is contacting as you accelerate. And from earth, it seems like time is going slower inside the moving spaceship.
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