dwarf galaxies: problems dark matter hypothesis, successes of MOND

[pantheory]

This article emphasises more the succusses of MOND gravity rather than the failures of dark matter to pridict observed reality concerning stellar movements in dwarf gallaxies. The bigger news, however, may be the lack of predictive power concerning the dark matter hypothesis. I think such successes and failures may imply that the dark matter hypothesis is more a retrodictive system than a predictive one, while at least in these cases the MOND hypothesis made accurate predictions.

 

http://www.eurekalert.org/pub_releases/2013-08/cwru-mpd082813.php

 

 

 

[Humblemun]

Yes, this is the way forward imv.

[pantheory]

Yes, this is the way forward imv.

 

One reason astronomers and physists do not like Milgram's MOND is because it has no logical or theoretical basis to explain why the strength of gravity should change over different scales of the universe. On the other hand, the dark matter hypothesis is an addendum to conventional gravity theory, but it fails to predict as well as MOND, and in some cases its predictions are contrary to observation, or none can be made, as is the case concerning some dwarf galaxies, according to the above article.

[Humblemunn]

One reason astronomers and physists do not like Milgram's MOND is because it has no logical or theoretical basis to explain why the strength of gravity should change over different scales of the universe. On the other hand, the dark matter hypothesis is an addendum to conventional gravity theory, but it fails to predict as well as MOND, and in some cases its predictions are contrary to observation, or none can be made, as is the case concerning some dwarf galaxies, according to the above article.

Take a look at post#7 and onwards for a theoretical basis to explain why the strength of gravity should change over different scales of the universe: Flyby predictions

Edited August 30, 2013 by Humblemunn

[pantheory]

Take a look at post#7 and onwards for a theoretical basis to explain why the strength of gravity should change over different scales of the universe: Flyby predictions

 

Of course there could be a theoretical basis and justification for Migram's MOND, but so far I've heard no theoretical basis coming from Milgram; and if he has proposed a basis, it has not been considered meritorious by the mainstream. It is one thing to take all the available data and come up with appropriate equations to match them, but it is another to justify it/ them by a "first principles" derivation. Milgram's MOND only seems to apply to spiral galaxies. Elliptical galaxies may have closer to Newtonian gravity, or unpredictable stellar motions.

 

Milgram also opened the door for a number of other MOND models by others that have similar predictions as Milgram and at least one with a GR type foundation. Dark matter is still a very active research objective. Within maybe a decade I think the mainstream thinking about gravity will change. We'll see.