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BoBo

InActive

Registered: 2003-11-02

Posts: 5

Re: Armstrong: anti-gravity a possible breakthrough

Don't forget to pay attention to Gravity Probe B, which will be launched in Dec 2003 by NASA. It has been built for decades and just to read about the engineering wonders they had to do to make it possible is very very interesting.
More details about the probe is at http://einstein.stanford.edu/

It will experimentally check for gravitic waves, etc. 

Mars_B4_Moon

Member

Registered: 2006-03-23

Posts: 9,776

Re: Armstrong: anti-gravity a possible breakthrough

worth a bump maybe

Anti-Gravity still sounds like scifi and not reality

yet... sometimes we see new events and happenings in the universe which were once considered fringe and science fiction and more based on philosophy not reality

X-rays have been detected from behind a black hole for the first time ever | First-ever recordings of X-ray emissions from a black hole's far side finally confirm Einstein's general relativity theory.
https://interestingengineering.com/scie … first-time

Last edited by Mars_B4_Moon (2023-09-29 15:44:51)

Mars_B4_Moon

Member

Registered: 2006-03-23

Posts: 9,776

Re: Armstrong: anti-gravity a possible breakthrough

It's Official, Antimatter Falls Down in Gravity, Not Up

https://www.universetoday.com/163439/it … ty-not-up/

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,369

Re: Armstrong: anti-gravity a possible breakthrough

For Mars_B4_Moon re #28

Thank you for the link you provided, with the little headline!

I am happy to see the researchers have more work to do ... the observations yielded only about 1 meter per second per second fall rate toward Earth instead of 9.8 seen by ordinary matter.

This is another example of superb scientific research at CERN. 

(th)

Void

Member

Registered: 2011-12-29

Posts: 7,815

Re: Armstrong: anti-gravity a possible breakthrough

This makes me wonder if dark energy may more easily push Antimatter away from our view.  Nothing said about inertia, but gravity may resist a push from dark energy in normal matter.  If so, then perhaps most Antimatter has been pushed out of our part of the universe.  Just a guess, easy to be wrong.

If at all true, then in the initial expansion, matter would be preferentially retained towards the center of the universe's gravitation, if there is such a thing.

Done.

Last edited by Void (2023-09-30 11:39:15)

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tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,369

Re: Armstrong: anti-gravity a possible breakthrough

For Void re #30

This is intended as a tip about some recent findings reported by Mars_B4_Moon ... if you have already seen this, then my "tip" is not needed.

In a recent post by Mars_B4_Moon, the article at the end of the link reported on research into a concept called "MONDS" (I thihk) which apparently can account for discrepancies of observations that led to invention of dark matter and dark energy in the first place.   The article (as I remember it) speculates that dark matter and dark energy may not be needed at all.

In any case, I thought the ideas discussed in the article might fit into this topic.

(th)

Void

Member

Registered: 2011-12-29

Posts: 7,815

Re: Armstrong: anti-gravity a possible breakthrough

Very well: https://en.wikipedia.org/wiki/Modified_ … n_dynamics
Quote:

Modified Newtonian dynamics (MOND) is a hypothesis that proposes a modification of Newton's law of universal gravitation to account for observed properties of galaxies. It is an alternative to the hypothesis of dark matter in terms of explaining why galaxies do not appear to obey the currently understood laws of physics.

OK, forget the phrase "Dark Energy".  My point was that whatever made the universe expand, if it did expand, would have exhibited a force on Matter and Antimatter, and if Antimatter has a less attraction to gravity, that force might have pushed the Antimatter away more successfully, and if the universe is a bubble, then Antimatter may be over the horizon, with its light being unable to reach us anymore.

But, if you believe in a steady state universe, then that would not be so likely to be true.

So, if the bulk of matter and antimatter are segregated from each other by distance, then that could explain why they have not completely annihilated each other.

Variations on that may depend on when if ever the expansion force ceased to exist.  If it was present when matter and antimatter formed, then perhaps what I have said may be true.

Done.

Last edited by Void (2023-09-30 16:02:38)

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Mars_B4_Moon

Member

Registered: 2006-03-23

Posts: 9,776

Re: Armstrong: anti-gravity a possible breakthrough

LIGO-Virgo-KAGRA Collaboration is proud to announce GW230529, the first exceptional GravitationalWaves event from our fourth observing run
https://twitter.com/LIGO/status/1776317857871073444

the exotic ideas within scifi might not apply until some time into the future but for now

a moving and spinning centrifuge station for artificial gravity?

Artificial Gravity Provides Partial Protection for Biology in Space
https://www.nasa.gov/centers-and-facili … -in-space/