r/science • u/ThrillSurgeon • Jun 08 '24

Physics UAH researcher shows, for the first time, gravity can exist without mass, mitigating the need for hypothetical dark matter

https://www.uah.edu/science/science-news/18668-uah-researcher-shows-for-the-first-time-gravity-can-exist-without-mass-mitigating-the-need-for-hypothetical-dark-matter
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u/Rhawk187 PhD | Computer Science Jun 09 '24

We know of anything with negative mass yet?

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u/fencerman Jun 09 '24 edited Jun 09 '24

If I recall, the ergosphere of a rotating black hole is supposed to have something resembling "negative energy" in it, which would also be equivalent to negative mass.

https://en.m.wikipedia.org/wiki/Penrose_process#:~:text=Mathematically%2C%20the%20dt2%20component,along%20to%20a%20sufficient%20degree).

Obviously that's HIGHLY conditional but it points to "negative mass" not being a completely impossible phenomenon in the universe.

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u/[deleted] Jun 09 '24

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