Dark matter composition
Unsolved problems in physics: What is dark matter? How is it generated? Is it related to supersymmetry?
Although dark matter was detected by its gravitational lensing in August 2006, many aspects of dark matter remain speculative. The
DAMA/NaI experiment and its successor DAMA/LIBRA have claimed to directly detect dark matter passing through the Earth, though most scientists remain
skeptical since negative results of other experiments are (almost) incompatible with the DAMA results if dark matter consists of neutralinos.
Data from a number of lines of evidence, including galaxy rotation curves, gravitational lensing, structure formation, and the fraction of baryons in
clusters and the cluster abundance combined with independent evidence for the baryon density, indicate that 85-90% of the mass in the universe does
not interact with the electromagnetic force. This "dark matter" is evident through its gravitational effect. Several categories of dark matter have
* Nonbaryonic dark matter - which is divided into three different types:
o Hot dark matter - nonbaryonic particles that move ultrarelativistically
o Warm dark matter - nonbaryonic particles that move relativistically
o Cold dark matter - nonbaryonic particles that move non-relativistically
***Seems the observation has become more and more interesting. Ultra-norm-non relative. And, obvious implied momentum. What, in this world is
So, it's like, here we have something we've looked into, seen evidence. Suggested it would not behave under normal five forces. Now, all of a
sudden, I'm going ultra-wait-don't at what the heck I saw to begin with. Confusing?
I'd assume that a lot of this momentum (detectable, of course); is, in fact, dispersed throughout the expanse of space. Where, these assumed
collisions are interacted upon yet further. But, ultra and non relative. Where's Einstein when you need him...