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3 votes
1 answer
163 views

Intergalactic Lyman-alpha absorption for high redshift quasars (Gunn-Peterson effect)

This is a follow up to a recent question on SE asking about the apparent suppression of radiation shortward of the (red-shifted) Ly-$\alpha$ line of a quasar at redshift $z=6.53$. The general ...
Thomas's user avatar
  • 3,504
2 votes
1 answer
82 views

Is our Milky Way galaxy (and its neighbors?) moving through the universe at 370 km/s (~828,000 mph) or 370 miles/sec (~1,332,000 mph)? [duplicate]

I swear that exactly half of the many, many sites I found say that our Galaxy and its immediate neighbors are moving towards the Leo Constellation (I believe) and, ultimately, supposedly, the 'Great ...
Kurt Hikes's user avatar
  • 5,307
1 vote
1 answer
102 views

What exactly is a "conclusive association" in Astronomy?

Phys.org's Astronomers use slime mold model to reveal dark threads of the cosmic web says A computational approach inspired by the growth patterns of a bright yellow slime mold has enabled a team of ...
uhoh's user avatar
  • 30.7k
11 votes
1 answer
320 views

Dark Flow: statistical limits on existence

Dark Flow has been thrown around as a term a lot lately, especially with the latest Planck results. New Scientist reported last year that it was now statistically improbable, but the paper by Atrio ...
christopherlovell's user avatar