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Have Astronomers proven Einsteins predictions on gravity?


Even phenomenally dense neutron stars fall like a feather
Date:
July 4, 2018
Source:
Green Bank Observatory
Summary:
Astronomers have given one of Einstein's predictions on gravity its most stringent test yet. By precisely tracking the meanderings of three stars in a single system -- two white dwarf stars and one ultra-dense neutron star -- the researchers determined that even phenomenally compact neutron stars 'fall' in the same manner as their less-dense counterparts, an aspect of nature called the 'Strong Equivalence Principle.'
See links.
https://twitter.com/ScienceDaily/status/1014636749383823360
https://www.sciencedaily.com/releases/2018/07/180704135318.htm?utm_source=dlvr.it&utm_medium=twitter

161 day(s) ago

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Answers (1)

Kravenhead
Pretty much.. yeah.
That's amazing. The neutron star in the system they're studying rotates 366 times per second.
That affords them precision measurements.
I remember doing this experiment in science class. As I recall, we used balls of obvious different weights.
We used balls because their resistance to the air would be approximately the same.
The experiment is best done in a vacuum. (Actually, only partial vacuums can be achieved. Like they say... Nature doesn't like vacuums.)

Posted 161 day(s) ago

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