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"Dark Energy" Dominates The Universe
Dartmouth College ^
| January 2, 2003
| Brian Chaboyer, Lawrence Krauss
Posted on 01/03/2003 6:35:40 AM PST by forsnax5
click here to read article
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1
posted on
01/03/2003 6:35:41 AM PST
by
forsnax5
To: *crevo_list
Cosmology PING!
2
posted on
01/03/2003 6:37:09 AM PST
by
forsnax5
To: Chancellor Palpatine; Darth Sidious
Dark Energy Ping.
To: martin_fierro; Chancellor Palpatine; Darth Sidious; dighton
Use the Force, Luke!
To: forsnax5
9 Billion with 12 billion year old star clusters...well, that's a bit closer. Universe: 9-12 Billion (maybe 14 Billion). Oldest stars: 16-20 Billion.
5
posted on
01/03/2003 6:52:09 AM PST
by
lepton
To: forsnax5
At least two of the world's primary energy sources, coal and crude oil, are very dark. Maybe this is just a shallow philosophic argument anyway.
6
posted on
01/03/2003 6:53:34 AM PST
by
FreePaul
To: forsnax5
ET PHONE HOME, DADDY WANTS YOU
7
posted on
01/03/2003 6:53:49 AM PST
by
bmwcyle
To: forsnax5
Sounds like a Democratic scheme to me!
8
posted on
01/03/2003 6:55:01 AM PST
by
Henchman
To: forsnax5
So that's where those voices are coming from....
All kidding aside, interesting article.
9
posted on
01/03/2003 6:56:16 AM PST
by
lds23
To: forsnax5
read later
To: VadeRetro; jennyp; Junior; longshadow; *crevo_list; RadioAstronomer; Scully; Piltdown_Woman; ...
Dark energy ping.
[This ping list for the evolution -- not creationism -- side of evolution threads, and sometimes for other science topics. To be included, or dropped, let me know via freepmail.]
To: All
To: PatrickHenry
Krauss and Chaboyer came to the conclusion that the universe is expanding more quickly now than it did in the past. Thanks for the ping.
I'm still trying to comprehend the above statement. I should have taken more math.
To: PatrickHenry
That last paragraph:
The only explanation, according to Chaboyer and Krauss, for an accelerating universe is that the energy content of a vacuum is non-zero with a negative pressure, in other words, dark energy. This negative pressure of the vacuum grows in importance as the universe expands and causes the expansion to accelerate.
It has an eerily Barry-Setterfieldian "more energy is periodically pumped into the universe from the vacuum, thus violating conservation of energy" kind of ring. I hate it when the loonies get something to lawyer with.
To: MadIvan
ping
To: VadeRetro
... the energy content of a vacuum is non-zero with a negative pressure ...This sounds like what most of the crevo threads devolve into...
16
posted on
01/05/2003 12:01:02 PM PST
by
forsnax5
To: forsnax5
They certainly expand readily.
To: forsnax5
The universe will forever be far more unpredictable than our laughable neat little theories envision.
18
posted on
01/05/2003 12:04:38 PM PST
by
friendly
To: PatrickHenry
half-time bttt
To: VadeRetro
... the energy content of a vacuum is non-zero with a negative pressure, in other words, dark energy ... I donno. More energy is actually more matter/energy, which automatically means more gravity. And if gravity has a minus sign (as it must to cancel out matter/energy and result in a net zero for the universe), then this new dark energy stuff must be generating more gravity, which automatically cancels it out and we'd still have a net energy component of zero for the universe. Makes sense? We need Physicist to come to our aid.
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