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This is what the first stars looked like as they were being born

This is what the first stars looked like as they were being born
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Tom-abel , Ralf-kaehler , Stanford-kavli-institute-for-particle-astrophysics , Kavli-institute , Particle-astrophysics , James-webb-space-telescope ,

Are the "missing baryons" simply too hot to see?

There are two types of missing, or "dark" matter: baryonic (made of normal matter) and non-baryonic. Have we finally found the normal stuff?

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Comments of the Week #72: On Dark Matter, Black Holes, Starlight and more!

“I would rather be ashes than dust!
I would rather that my spark should burn out in a brilliant blaze than it should be stifled by dry-rot.
I would rather be a superb meteor, every atom of me in magnificent glow, than a sleepy and permanent planet.
The function of man is to live, not to exist.
I shall not waste my days trying to prolong them.
I shall use my time.” -Jack London

Japan , Japanese , Chris-mannering , Jack-london , Matt-heverly , Tatsuya-tanaka , J-tumlinson-stsc , Ralf-kaehler , Michael-kelsey , David-kingham , Tom-abel , Oliver-hahn

Ask Ethan #100: Why doesn't dark matter form black holes? (Synopsis)

“All enterprises that are entered into with indiscreet zeal may be pursued with great vigor at first, but are sure to collapse in the end.” -Tacitus
If you want to form a structure like a planet, star or black hole, you need a large amount of mass together in one place. The way to bring that mass together, of course, is through the force of gravity, which attracts everything with mass towards one another in this Universe.

Tom-abel , Oliver-hahn , Ralf-kaehler ,

Merging Neutron Stars Deliver Deathblow To Dark Matter And Dark Energy Alternatives

"Dark matter is interesting. Basically, the Universe is heavier than it should be. There's whole swathes of stuff we can't account for." -Talulah Riley

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Why Dark Matter Rules Mini-Galaxies!

"A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it." -Max Planck
(For Alan L., from the comments on this post.)

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Dark Energy, Dark Flow, and can we explain it away?

"Deep into that darkness peering, long I stood there, wondering, fearing, doubting, dreaming dreams no mortal ever dared to dream before." -Edgar Allen Poe
Earlier this week, the Nobel Prize in Physics was announced for the discovery that the Universe is not only expanding,

Adam-moss , Ned-wright , Douglas-scott , Edgar-allen-poe , Kyle-dawson , Sean-carroll , Ralf-kaehler , Hubble-key-project-team , Supernova-search-team , Edgar-allen , Nobel-prize , Highz-supernova-search

Found: The First Atoms In The Universe!!!

"We don't understand how a single star forms, yet we want to understand how 10 billion stars form." -Carlos Frenck
When we look out into the distant Universe, we're also looking back into the Universe's past. The farther away an object is, the longer it's taken its light to travel from it to our eyes. And each time we observe something farther away than anything we've seen before, we're looking farther back into the past -- closer to the Big Bang -- than ever before.

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Why doesn't dark matter form black holes? (Synopsis)

More like this
What's the story on the actual progress of trying to put it within the standard model? For as long as I remember, the story (here on blog, but elsewhere as well) revolves around more and more observations that it's real. OK, but what about the actual particle? Are we really out of ideas for more than 20 years? IMO axions sound promising, but is there no model that doesn't require super simetry?
It almost.. almost.. seems like the majority of community has accepted it, and fell into the usual re-print of how we know about it. But I would really be interested to hear from time to time if some groups are making any progress in actually figuring where or how it sits in grand scheme of things in the theoretical sense.

Tom-abel , Oliver-hahn , Ralf-kaehler , Standard-model , டோம்-ஏபெல் , ஆலிவர்-ஹான் , தரநிலை-மாதிரி ,