Unraveling the Mystery of Dark Matter

AI Thread Summary
Dark matter is a mysterious substance that constitutes about 23% of the universe's mass-energy, primarily inferred from gravitational effects on galaxies and clusters. Its composition remains largely unknown, with theories suggesting it is mostly non-baryonic, meaning it is not made up of ordinary matter. Some scientists propose that neutralinos could be a major component of cold dark matter, while others mention axions and Kaluza-Klein matter as potential candidates. Despite various theories, there is currently no empirical evidence supporting any specific explanation for dark matter. The role of string theory in elucidating dark matter remains uncertain.
aniket
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Hey guys,
what is dark matter?what is it made up of and where is it?can any theory explain this?
can string theory explain this? so please frendz help me out of this.
 
Astronomy news on Phys.org
The evidence for the existence of dark matter lies in various graviational effects on a large scale (galaxies and clusters of galaxies). What it is made of is still unknown. All that can be said is that most of it is NOT baryonic (ordinary) matter. There are several theories, but no evidence yet for any of them.
 
What it is made of is still unknown.
I agree of course (your answer is the good one).
However, what i would just like to add is that i think that quite a lot of scientisit think that neutralinos (http://en.wikipedia.org/wiki/Neutralino) may be the mayor constituent of cold dark matter.

All that can be said is that most of it is NOT baryonic (ordinary) matter.
Baryonic dark matter is object like dwarf stars and other tiny "dark"(=shineless -but i don't know if that word exist) objects.
http://map.gsfc.nasa.gov/m_uni/uni_101matter.html
http://www.universetoday.com/am/publish/dark_matter_galaxy.html?2322005

Just to add : dark matter seems to make up around 23% of our universe mass-energy

can string theory explain this?
No idea ! Sorry :(

Benjamin
 
Axions are still popular.
 
Kaluza-Klein matter is also a suggestion.
 

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