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Astronomers have long known that many surveys of distant galaxies miss 90% of their targets, but they didn't know why. Now, astronomers have determined that a large fraction of galaxies whose light took 10 billion years to reach us have gone undiscovered.
Originally posted by CHA0S
reply to post by n1gm4t1c
Wowzah! That's amazing, thanks for posting this. So now every theory out there that tried to explain this missing matter in our universe will just be thrown out the window
Astronomers have long known that many surveys of distant galaxies miss 90% of their targets, but they didn't know why.Now, astronomers have determined that a large fraction of galaxies whose light took 10 billion years to reach us have gone undiscovered.
most of the Lyman-alpha light is trapped within the galaxy that emits it, and 90% of galaxies do not show up in Lyman-alpha surveys.
Originally posted by Horza
Yes! This will change our understanding of cosmology but it won't effect Dark Matter or Energy theory at all ... that stuff is still (maybe) out there
Originally posted by AceWombat04
Thanks for your reply.
What I'm getting at is, do physicists believe that the physical mass of the universe has a finite quantity? Or do they believe that it extends outward forever? We always talk about the "visible universe," but that's limited by how far light has traveled to us thus far. What I'm wondering is: do physicists postulate that there is more beyond that, and how much more?
But wasn't the missing 90% or so mass (whatever the figure) the reason that dark matter was 'invented'? Where does dark matter come in to it if we can account for most of the universe?
But wasn't the missing 90% or so mass (whatever the figure) the reason that dark matter was 'invented'?
Where does dark matter come in to it if we can account for most of the universe?
Dark matter was postulated by Fritz Zwicky in 1934, to account for evidence of "missing mass" in the orbital velocities of galaxies in clusters. Subsequently, other observations have indicated the presence of dark matter in the universe, including the rotational speeds of galaxies, gravitational lensing of background objects by galaxy clusters such as the Bullet Cluster, and the temperature distribution of hot gas in galaxies and clusters of galaxies.
The other ten percent perhaps ? Thats a huge ten percent when it includes 'most' of the universe. Who knows.