Powerful Galaxies Found in Infrared

demachina writes "NASA's Spitzer Infrared space telescope has discovered 'a mysterious population of distant and enormously powerful galaxies radiating in the infrared spectrum with many hundreds of times more power than our Milky Way galaxy.' They are 80% of the way back to the big bang. They found them by comparing a visible and infrared scan of the sky and looking at the places where there was a big infrared signature and no visible one. They are shrouded in dust."

Comments

Is Dark Matter just hidden matter?

[Kraemahz]

This begs one to ask, if we keep finding these galaxies that are emitting energy but no light, is this dark matter or is it just normal matter that we just haven't been able to find yet? There might be a hell of a lot more dust out there than we thought there was originally.

Something i have always wondered

[X0563511]

If all the stars and celestial bodies (galaxies, ect.) are all different distances from us, and are all moving in relation to each other...

How do we know where they really are? If any EM radiation takes time to get here... Our night sky view is a view of something that has never happened, is not happening now, and will not happen (at least the particular configuration we see). The same thing goes for our radio telescopes, thermal, x-ray, ect.

That galaxy they found could not even exist now, or it may actually be 180 degrees relative to where we see it now.

Am i just crazy? Or do we have NO hope of actually figuring out where things are unless we figure out how to use quantum mechanics somehow to do it?

galaxies full of dyson spheres?

[Anonymous Coward]

a dyson sphere is said to only radiate infrared. wiki