Posted by
michael
on from the space-is-wide-and-space-is-deep dept.
chill writes "CNN is reporting that "Scientists have discovered evidence that hordes of dark, miniature galaxies surround ordinary galaxies, lending credence to the theory that the universe is comprised mostly of cold, dark matter." The study was partly funded by NASA and the U.S. DOE."
Re:Color distortion?
by
mmarlett
·
· Score: 3, Insightful
Okkaaay...
No one said anything about the life-sustaing capacities of dark matter, so I'm not sure what to tell you on that one.
Scientist learn about what is in stars / planets by breaking apart the light that comes from / is reflected off of them. It's called spectroscopy, and you can learn about the basics of it here.
But the long and the short of it is that what they are talking about is most certainly "scientifically" proven. It's all pretty simple once you do your homework. Visit a local telescope: even the most low-rent ones have a prism, a light bulb a few filters to show you how to split light to figure out its spectra. It's a fundamental of astronomy that astronomers tend to gloss over because lay people just get glassy eyed if they try to explain it every time.
Re:More and more...
by
Anonymous Coward
·
· Score: 2, Insightful
These satellite galaxies can only help explain the orbital behavior of galactic clusters. To explain the rotation *within* a galaxy, you need more mass *inside* the galaxy.
So it's just not a matter of finding more mass, the mass needs to be located where it is missing.
Slashdot Mirror
Okkaaay ...
No one said anything about the life-sustaing capacities of dark matter, so I'm not sure what to tell you on that one.
Scientist learn about what is in stars / planets by breaking apart the light that comes from / is reflected off of them. It's called spectroscopy, and you can learn about the basics of it here.
But the long and the short of it is that what they are talking about is most certainly "scientifically" proven. It's all pretty simple once you do your homework. Visit a local telescope: even the most low-rent ones have a prism, a light bulb a few filters to show you how to split light to figure out its spectra. It's a fundamental of astronomy that astronomers tend to gloss over because lay people just get glassy eyed if they try to explain it every time.
These satellite galaxies can only help explain the orbital behavior of galactic clusters. To explain the rotation *within* a galaxy, you need more mass *inside* the galaxy.
So it's just not a matter of finding more mass, the mass needs to be located where it is missing.