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Author Topic:   Creation cosmology and the Big Bang
Inactive Member

Message 93 of 305 (664680)
06-04-2012 2:54 AM

dark matter
A recent article from via Yahoo! News. A part of the article:
How hot is dark matter?
In the 1960s and 1970s, astronomers hypothesized that there might be more mass in the universe than what is visible. Vera Rubin, an astronomer at the Carnegie Institution of Washington, studied the speeds of stars at various locations in galaxies. [Top 10 Strangest Things in Space]
Rubin observed that there was virtually no difference in the velocities of stars at the center of a galaxy compared to those farther out. These results seemed to go against basic Newtonian physics, which implies that stars on the outskirts of a galaxy would orbit more slowly.
Astronomers explained this curious phenomenon with an invisible mass that became known as dark matter. Even though it cannot be seen, dark matter has mass, so researchers infer its presence based on the gravitational pull it exerts on regular matter.
Dark matter is thought to make up about 23 percent of the universe, while only 4 percent of the universe is composed of regular matter, which includes stars, planets and humans.
"Scientists still don't know what dark matter is, but that could soon change," Cho wrote. "Within years, physicists might be able to detect particles of the stuff."
But while astronomers may soon be able to detect particles of dark matter, certain properties of the material remain unknown.
"In particular, studies of runty 'dwarf galaxies' might test whether dark matter is icy cold as standard theory assumes, or somewhat warmer essentially a question of how massive particles of dark matter are," Cho explained.
8 Modern Astronomy Mysteries Scientists Still Can't Explain
Edited by Chuck77, : No reason given.

Replies to this message:
 Message 97 by Taq, posted 06-04-2012 3:52 PM Chuck77 has not replied

Inactive Member

Message 189 of 305 (666193)
06-23-2012 8:10 PM
Reply to: Message 187 by NoNukes
06-23-2012 11:34 AM

Re: Big Bang violates physics
NoNukes writes:
Nonsense. You oppose the big bang because you don't like it. You accept contrary crank hypothesis and dismiss criticisms of those hypothesis without regard for the evidence.
Hi NoNukes. Could you provide some evidence for the big bang? Actual evidence that supports it. What actual evidence is there that makes it a better theory than other theories?

This message is a reply to:
 Message 187 by NoNukes, posted 06-23-2012 11:34 AM NoNukes has replied

Replies to this message:
 Message 190 by Panda, posted 06-23-2012 8:55 PM Chuck77 has not replied
 Message 193 by onifre, posted 06-24-2012 10:50 AM Chuck77 has not replied
 Message 196 by dwise1, posted 06-24-2012 2:06 PM Chuck77 has not replied
 Message 197 by NoNukes, posted 06-24-2012 3:52 PM Chuck77 has not replied

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