Author Topic: The Dark Side of the Force  (Read 1976 times)

Offline bn

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The Dark Side of the Force
« on: September 13, 2012, 09:07:58 AM »
So here's a paper about how new data says that dark energy is really there!

dark energy causes the expansion of the universe to accelerate.
and it's mysterious because it gets more potent the more it gets spread out,
and it might just cause the universe to rip itself apart (Ti Phy episode 1)


this might be worth a second episode.
we could talk about the popular alternative cosmological model to the conventional one,
where we're in the middle(ish) of a big collapsing cloud of stuff.
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Offline Daneel

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Re: The Dark Side of the Force
« Reply #1 on: September 13, 2012, 11:20:36 AM »
Interesting... and also depressing if you read the comments.

Ben, do you have a sense about the scientific consensus on the existence of Dark Energy? From my superficial reading on the topic, it seems it's fairly solid but not as solid as Dark Matter.

Offline bn

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Re: The Dark Side of the Force
« Reply #2 on: September 13, 2012, 12:27:48 PM »
yeah.
as far as I know, people are pretty sure it's real...
you know, so if they're working on a cosmological model which can (coincidentally) explain the data
they point it out.

that said, there are some people who are trying to explain it away using all sorts of zany cosmological models. there's one where we're in the middle of a collapsing bubble of matter... which if it's done correctly, could also explain it.
there are other ones where people change the way gravity curves around matter.

it's lots o fun.
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