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 Post subject: Re: Cosmology Thread
PostPosted: Wed Oct 04, 2017 7:16 pm 
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Some Odd Behavior Was Detected in a Distant Galaxy

http://blogs.discovermagazine.com/d-bri ... -behavior/

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 Post subject: Re: Cosmology Thread
PostPosted: Thu Oct 05, 2017 1:23 pm 
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Universe in a bubble

https://aeon.co/essays/did-our-cosmos-e ... ng-bubbles

Quote:
Maybe we don’t have to speculate about what life is like inside a bubble. It might be the only cosmic reality we know

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 Post subject: Re: Cosmology Thread
PostPosted: Sun Oct 08, 2017 7:38 pm 
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Colliding Dead Stars May Explain the Milky Way's Mysterious Antimatter

https://www.seeker.com/space/astrophysi ... antimatter

Quote:
The majority of antimatter that pervades the Milky Way may come from clashing remnants of dead stars, a new study finds.

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 Post subject: Re: Cosmology Thread
PostPosted: Fri Oct 13, 2017 4:59 pm 
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Astronomers Discover Unusual Spindle-Like Galaxies

http://www.astrowatch.net/2017/10/astro ... indle.html

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 Post subject: Re: Cosmology Thread
PostPosted: Tue Oct 17, 2017 12:49 pm 
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Filling the Early Universe with Knots Can Explain Why the World Is Three-Dimensional

http://www.astrowatch.net/2017/10/filli ... s-can.html

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 Post subject: Re: Cosmology Thread
PostPosted: Sun Oct 22, 2017 8:56 am 
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Wormholes Untangle a Black Hole Paradox

https://www.quantamagazine.org/wormhole ... -20150424/

Quote:
A bold new idea aims to link two famously discordant descriptions of nature. In doing so, it may also reveal how space-time owes its existence to the spooky connections of quantum information.

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 Post subject: Re: Cosmology Thread
PostPosted: Fri Oct 27, 2017 6:06 pm 
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The Universe Should Have Destroyed Itself at the Big Bang. Why Didn't It?

https://www.seeker.com/space/astrophysi ... y-didnt-it

Quote:
The mystery of why the universe exists has deepened as an ultra-precise comparison of the magnetism of matter and antimatter shows no difference.

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 Post subject: Re: Cosmology Thread
PostPosted: Mon Oct 30, 2017 8:40 am 
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Chinese Scientists Measure Universe with 'Magic Ruler'

http://www.astrowatch.net/2017/10/chine ... verse.html

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 Post subject: Re: Cosmology Thread
PostPosted: Tue Oct 31, 2017 3:03 pm 
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How Black Holes Shoot Out Lethal Plasma Jets Is Becoming Clearer

https://www.seeker.com/space/astrophysi ... ng-clearer

Quote:
Researchers are trying to understand the extreme physics of black holes, and are zeroing in on how they project bright columns of hot gas and radiation.

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 Post subject: Re: Cosmology Thread
PostPosted: Tue Oct 31, 2017 4:53 pm 
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Physicists Hunt for the Big Bang’s Triangles

https://www.quantamagazine.org/physicis ... -20160419/

Quote:
The story of the universe’s birth — and evidence for string theory — could be found in triangles and myriad other shapes in the sky.

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 Post subject: Re: Cosmology Thread
PostPosted: Fri Nov 03, 2017 8:52 pm 
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The Fuzzball Fix for a Black Hole Paradox

https://www.quantamagazine.org/how-fuzz ... -20150623/

Quote:
By replacing black holes with fuzzballs — dense, star-like objects from string theory — researchers think they can avoid some knotty paradoxes at the edge of physics.

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 Post subject: Re: Cosmology Thread
PostPosted: Tue Nov 07, 2017 11:49 am 
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Make the Cosmic Perspective Your Next Coping Mechanism

http://nautil.us/blog/make-the-cosmic-p ... -mechanism

Wow.

Of relevance from Douglas Adams's The Restaurant At The End Of The Universe:

Quote:
The Total Perspective Vortex derives its picture of the whole Universe on the principle of extrapolated matter analyses.
To explain—since every piece of matter in the Universe is in some way affected by every other piece of matter in the Universe, it is in theory possible to extrapolate the whole of creation—every sun, every planet, their orbits, their composition and their economic and social history from, say, one small piece of fairy cake.
The man who invented the Total Perspective Vortex did so basically in order to annoy his wife.
Trin Tragula—for that was his name—was a dreamer, a thinker, a speculative philosopher or, as his wife would have it, an idiot.
And she would nag him incessantly about the utterly inordinate amount of time he spent staring out into space, or mulling over the mechanics of safety pins, or doing spectrographic analyses of pieces of fairy cake.
"Have some sense of proportion!" she would say, sometimes as often as thirty-eight times in a single day.
And so he built the Total Perspective Vortex—just to show her.
And into one end he plugged the whole of reality as extrapolated from a piece of fairy cake, and into the other end he plugged his wife: so that when he turned it on she saw in one instant the whole infinity of creation and herself in relation to it.
To Trin Tragula's horror, the shock completely annihilated her brain; but to his satisfaction he realized that he had proved conclusively that if life is going to exist in a Universe of this size, then the one thing it cannot afford to have is a sense of proportion.

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 Post subject: Re: Cosmology Thread
PostPosted: Wed Nov 15, 2017 8:55 pm 
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Astronomers Found a New Type of Cosmic Explosion

http://www.popularmechanics.com/space/d ... explosion/

Quote:
It could be a supernova, or a black hole shredding a star, but it sure is massive.

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 Post subject: Re: Cosmology Thread
PostPosted: Mon Nov 20, 2017 6:24 pm 
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Astronomers Reveal Nearby Stars That Are Among The Oldest In Our Galaxy

http://www.astrowatch.net/2017/11/astro ... -that.html

Quote:
The team’s work increased the known population of old stars in our solar neighborhood by 25 percent. Among the new subdwarfs, the researchers discovered two old binary stars, even though older stars are typically found to be alone, rather than in pairs.

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 Post subject: Re: Cosmology Thread
PostPosted: Mon Nov 27, 2017 3:23 pm 
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Before the Big Bang

http://www.astrowatch.net/2017/11/before-big-bang.html

Quote:
In a study recently published in the journal General Relativity and Gravitation, Neves suggests the elimination of a key aspect of the standard cosmological model: the need for a spacetime singularity known as the Big Bang.

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 Post subject: Re: Cosmology Thread
PostPosted: Mon Nov 27, 2017 4:31 pm 
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Hidden Supercluster Could Solve Milky Way Mystery

https://www.quantamagazine.org/hidden-s ... -20171121/

Quote:
Astronomers generally stay away from the “Zone of Avoidance.” When one astronomer didn’t, she found a giant cosmic structure that could help explain why our galaxy moves so fast.

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 Post subject: Re: Cosmology Thread
PostPosted: Fri Dec 01, 2017 9:14 am 
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Black holes are simpler than forests and science has its limits

https://aeon.co/ideas/black-holes-are-s ... its-limits

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 Post subject: Re: Cosmology Thread
PostPosted: Sat Dec 02, 2017 12:20 pm 
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A Physicist’s Physicist Ponders the Nature of Reality

https://www.quantamagazine.org/edward-w ... -20171128/

Quote:
Edward Witten reflects on the meaning of dualities in physics and math, emergent space-time, and the pursuit of a complete description of nature.

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 Post subject: Re: Cosmology Thread
PostPosted: Wed Dec 06, 2017 3:36 pm 
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What is the Most Massive Object in the Universe?

https://astrobites.org/2017/12/06/what- ... -universe/

Contrary to popular belief, it's not your mom.

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 Post subject: Re: Cosmology Thread
PostPosted: Thu Dec 07, 2017 4:58 pm 
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Scientists just found the oldest known black hole, and it’s a monster

https://www.washingtonpost.com/news/spe ... a-monster/

Quote:
“If the universe was a 50-year-old person,” Bañados explained. “Now we have a photograph of that person as a toddler . . . when they were 2 ½.”

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 Post subject: Re: Cosmology Thread
PostPosted: Wed Dec 13, 2017 3:58 pm 
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How fast is dark matter?

https://astrobites.org/2017/12/13/how-f ... rk-matter/

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 Post subject: Re: Cosmology Thread
PostPosted: Fri Dec 15, 2017 8:27 pm 
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Mathematicians Propose Alternative Explanation for Cosmic Acceleration

http://www.astrowatch.net/2017/12/mathe ... ative.html

Quote:
Temple, Smoller and Vogler worked out solutions to General Relativity without invoking dark energy. They argue that the equations show that the Friedmann space-time is actually unstable: Any perturbation — for example if the density of matter is a bit lower than average — pushes it over into an accelerating universe.

Temple compares this to an upside-down pendulum. When a pendulum is hanging down, it is stable at its lowest point. Turn a rigid pendulum the other way, and it can balance if it is exactly centered — but any small gust will blow it off.


IMO dark matter is a dumb variable, and purely hypothetical like bigfoot, alien spacecraft, or string theory.

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 Post subject: Re: Cosmology Thread
PostPosted: Sat Dec 16, 2017 12:50 pm 
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GAMBIT Narrows the Hiding Places for ‘New Physics’

http://www.astrowatch.net/2017/12/gambi ... r-new.html

Quote:
The idea to build a set of modular software tools for the global analysis of observational data from various physical experiments arose in 2012 in Melbourne during an international conference on high energy physics. Currently, the GAMBIT group includes more than 30 researchers from scientific institutions in Australia, France, Spain, the Netherlands, Canada, Norway, Poland, the United States, Switzerland, Sweden and Great Britain. Dr Chrzaszcz, financed by the SONATA grant from the National Science Centre in Poland, joined the GAMBIT team three years ago in order to develop tools modelling the physics of massive quarks, with particular reference to beauty quarks (usually this field of physics has a much more catchy name: heavy flavor physics).

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 Post subject: Re: Cosmology Thread
PostPosted: Mon Dec 18, 2017 9:20 am 
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All spun up

https://astrobites.org/2017/12/18/all-spun-up/

Quote:
Constraints on the spin evolution of young planetary-mass companions

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 Post subject: Re: Cosmology Thread
PostPosted: Mon Jan 01, 2018 10:19 pm 
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The expanding universe: an introduction

https://arxiv.org/abs/1712.10315

Quote:
An introduction to the physics and mathematics of the expanding universe, using no more than high-school level / undergraduate mathematics. Covered are the basics of scale factor expansion, the dynamics of the expanding universe, various distance concepts and the generalized redshift-luminosity relation, among other topics.


Cosmology for Dummies! It's only 107 pages!!!

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