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(Time)   The universe has been missing 80% of its mass, and scientists may have found it, right near Uranus   ( science.time.com) divider line
    More: Followup, Uranus, universe, Alpha Magnetic Spectrometer, WIMPs, dark matter, LHC, positrons, Nuclear Physics  
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6476 clicks; posted to Geek » on 05 Apr 2013 at 10:50 AM (5 years ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»

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2013-04-05 11:54:11 AM  
1 vote:

Telos: 1) Create a theory (aka make stuff up)

AGGGGGGGGGG, No no no no no.

1) Create a HYPOTHESIS
2) Observe/test
3) yada yada
4) Profit.
2013-04-05 11:15:42 AM  
1 vote:
So, FTA they are detecting positrons.  They think the decay of dark matter could produce positrons.

They also think pulsars could be a source of positrons.

IIRC, positrons can be spontaneously produced is a photon with sufficient energy has a specific interraction with a nucleus.

They say it is like looking for bears by looking for bear tracks.

I would say they are looking for Michael Jordan by examining foot prints left by Nike shoes. There are lots of Nike prints out there.
2013-04-05 11:05:12 AM  
1 vote:
"The Milky Way spins so fast it would fly apart if the gravity of some invisible matter weren't holding it together. Clusters of galaxies, buzzing around one another like angry bees, would similarly fragment and disperse. And when you run the gravitational numbers, the mysterious matter that keeps all that cosmic disintegration from happening should outweigh the familiar stuff by about four-to-one."

I'm just a lowly engineer, but It sounds like they just make up stuff like this to try to make sense of the order of the universe that we can't understand. Surely it has to be an invisible force or matter that we can't yet detect.....

(*spoiler alert*)
God's spinning the galaxy on a big stick.

coloring.thecolor.comView Full Size
ZAZ [TotalFark]
2013-04-05 10:40:05 AM  
1 vote:
What they found is the ratio of positrons to electrons rises at high energy, but is still well below 1:1. That seems weak evidence to claim dark matter. It is consistent with any process that generates high energy electron-positron pairs, or generates low energy pairs in an environment where they can be accelerated.
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