"Swiss Cheese" Model Refines Dark Energy Calculations

"Swiss Cheese" Model Refines Dark Energy Calculations

http://jpl.nasa.gov/news/features.cfm?feature=1988

i am just thinking "REUBAN SANDWICH YUM!"
you wierdos have your fun; if it were not for the likes of
atomic bombs maybe i could
think you were harmless.
will your insanity ever end?
peace and love,
and,
love and peace,
kirk
kirk gregory czuhai
http://kirkgregoryczuhai.ws
p.s.
now you see you are proving the universe is only about 6,000 years
old?!!!!
har har har!
(:-D
good luck!
FREE LOVE @
http://HeavenSense.ws
http://MtDew.ws
http://MountainDew.ws
Sam Wormley wrote:
Bluuuue Rajah wrote:
"Swiss Cheese" Model Refines Dark Energy Calculations

http://jpl.nasa.gov/news/features.cfm?feature=1988

In that article titled: "What Can Swiss Cheese Teach us
About Dark Energy?"

"A group of researchers from Fermi National Accelerator Laboratory in Batavia, Ill.,
recently invoked what's called the Swiss-cheese model of the universe to explain why these
supernovae might appear to be moving faster away from us than they really are. The
universe is made up of lumps of matter interspersed with giant holes, or voids, somewhat
like Swiss cheese. In fact, last year, astronomers at the University of Minnesota, Twin
Cities, reported finding the king of all known voids, spanning one billion light-years. In
other words, it would take light -- which holds the title for fastest stuff in the
universe -- one billion years to go from one side of the void to the other!

"The researchers at Fermi said these voids might lie between us and the supernovae being
observed, acting like concave lenses to make the objects appear dimmer and farther than
they really are. If so, then the supernova might not be accelerating away from us after
all. Their theory claimed to provide a way in which dark energy might go poof.

"Vanderveld and her colleagues at Cornell University, Ithaca, N.Y., looked more closely at
this theory and found a few "holes." The group at Fermi had assumed a bunch of voids would
line up between us and the supernovae, but Vanderveld's group said, in reality, the voids
would be distributed more randomly -- again like Swiss cheese. With this random
distribution, the voids are not enough to explain away dark energy".

On Dec 29, 10:25*am, Sam Wormley wrote:
Bluuuue Rajah wrote:
"Swiss Cheese" Model Refines Dark Energy Calculations

http://jpl.nasa.gov/news/features.cfm?feature=1988

* *In that article titled: "What Can Swiss Cheese Teach us
* *About Dark Energy?"

"A group of researchers from Fermi National Accelerator Laboratory in Batavia, Ill.,
recently invoked what's called the Swiss-cheese model of the universe to explain why these
supernovae might appear to be moving faster away from us than they really are. The
universe is made up of lumps of matter interspersed with giant holes, or voids, somewhat
like Swiss cheese. In fact, last year, astronomers at the University of Minnesota, Twin
Cities, reported finding the king of all known voids, spanning one billion light-years. In
other words, it would take light -- which holds the title for fastest stuff in the
universe -- one billion years to go from one side of the void to the other!

"The researchers at Fermi said these voids might lie between us and the supernovae being
observed, acting like concave lenses to make the objects appear dimmer and farther than
they really are. If so, then the supernova might not be accelerating away from us after
all. Their theory claimed to provide a way in which dark energy might go poof.

"Vanderveld and her colleagues at Cornell University, Ithaca, N.Y., looked more closely at
this theory and found a few "holes." The group at Fermi had assumed a bunch of voids would
line up between us and the supernovae, but Vanderveld's group said, in reality, the voids
would be distributed more randomly -- again like Swiss cheese. With this random
distribution, the voids are not enough to explain away dark energy".

Vanderveld should have done the math.

Given the refractive index of a *void* is almost exactly 1.000000
(take it as far as you like), and the density of "ordinary"
intergalactic space is about 10 to 100 hydrogen atomes per cubic
meter:

http://en.wikipedia.org/wiki/Intergalactic_space

The density of hydrogen at STP is 2 * 6.02252x10^23 * 1000 / 22.4 =
5.37725 × 10^25 atoms per cubic meter.
The refractive index of hydrogen gas at STP is about 1.000132

http://www.kayelaby.npl.co.uk/genera...2_5/2_5_7.html

It has been shown that the refractive index of hydrogen at low
pressures is approximately linear in pressu

http://adsabs.harvard.edu/abs/1993MPLB....7..907R

So the Intergalactic medium has an index of refraction on the order
of :
1.000132 * 100 / 5.37725 × 10^25 = 1 + 2.45478637 × 10^-28

That makes for an extremely weak diverging lens:

http://hyperphysics.phy-astr.gsu.edu...lenmak.html#c1

Note that in the lens-maker's formula, the power of the lens depends
on the DIFFERENCE of the refractive indices.

This gives us 1 - (1 + 2.45478637 × 10^-28) = - 2.45478637 × 10^-28
as a factor for the power in the lens. (The negative sign indicates a
diverging lens.)

The difference between the *apparent distance* to an object seen
through such a lens and the *actual distance* will be VERY difficult
to measure. It would require a measurement of Hubble's constant to a
precision we are not likely to see within the lifetime of this
universe.

Tom Davidson
Richmond, VA

Surely they are talking about the gravitational properties of the voids,
not their optical properties.

Geoff

In article c0be4ad3-0097-4337-9d14-
, says...
On Dec 29, 10:25*am, Sam Wormley wrote:
Bluuuue Rajah wrote:
"Swiss Cheese" Model Refines Dark Energy Calculations

http://jpl.nasa.gov/news/features.cfm?feature=1988

* *In that article titled: "What Can Swiss Cheese Teach us
* *About Dark Energy?"

"A group of researchers from Fermi National Accelerator Laboratory in Batavia, Ill.,
recently invoked what's called the Swiss-cheese model of the universe to explain why these
supernovae might appear to be moving faster away from us than they really are. The
universe is made up of lumps of matter interspersed with giant holes, or voids, somewhat
like Swiss cheese. In fact, last year, astronomers at the University of Minnesota, Twin
Cities, reported finding the king of all known voids, spanning one billion light-years. In
other words, it would take light -- which holds the title for fastest stuff in the
universe -- one billion years to go from one side of the void to the other!

"The researchers at Fermi said these voids might lie between us and the supernovae being
observed, acting like concave lenses to make the objects appear dimmer and farther than
they really are. If so, then the supernova might not be accelerating away from us after
all. Their theory claimed to provide a way in which dark energy might go poof.

"Vanderveld and her colleagues at Cornell University, Ithaca, N.Y., looked more closely at
this theory and found a few "holes." The group at Fermi had assumed a bunch of voids would
line up between us and the supernovae, but Vanderveld's group said, in reality, the voids
would be distributed more randomly -- again like Swiss cheese. With this random
distribution, the voids are not enough to explain away dark energy".

Vanderveld should have done the math.

Given the refractive index of a *void* is almost exactly 1.000000
(take it as far as you like), and the density of "ordinary"
intergalactic space is about 10 to 100 hydrogen atomes per cubic
meter:

http://en.wikipedia.org/wiki/Intergalactic_space

The density of hydrogen at STP is 2 * 6.02252x10^23 * 1000 / 22.4 =
5.37725 × 10^25 atoms per cubic meter.
The refractive index of hydrogen gas at STP is about 1.000132

http://www.kayelaby.npl.co.uk/genera...2_5/2_5_7.html

It has been shown that the refractive index of hydrogen at low
pressures is approximately linear in pressu

http://adsabs.harvard.edu/abs/1993MPLB....7..907R

On Jan 11, 11:40*pm, Nork wrote:
Surely they are talking about the gravitational properties of the voids,
not their optical properties.

Geoff

In article c0be4ad3-0097-4337-9d14-
, says...



On Dec 29, 10:25*am, Sam Wormley wrote:
Bluuuue Rajah wrote:
"Swiss Cheese" Model Refines Dark Energy Calculations

http://jpl.nasa.gov/news/features.cfm?feature=1988

* *In that article titled: "What Can Swiss Cheese Teach us
* *About Dark Energy?"

"A group of researchers from Fermi National Accelerator Laboratory in Batavia, Ill.,
recently invoked what's called the Swiss-cheese model of the universe to explain why these
supernovae might appear to be moving faster away from us than they really are. The
universe is made up of lumps of matter interspersed with giant holes, or voids, somewhat
like Swiss cheese. In fact, last year, astronomers at the University of Minnesota, Twin
Cities, reported finding the king of all known voids, spanning one billion light-years. In
other words, it would take light -- which holds the title for fastest stuff in the
universe -- one billion years to go from one side of the void to the other!

"The researchers at Fermi said these voids might lie between us and the supernovae being
observed, acting like concave lenses to make the objects appear dimmer and farther than
they really are. If so, then the supernova might not be accelerating away from us after
all. Their theory claimed to provide a way in which dark energy might go poof.

"Vanderveld and her colleagues at Cornell University, Ithaca, N.Y., looked more closely at
this theory and found a few "holes." The group at Fermi had assumed a bunch of voids would
line up between us and the supernovae, but Vanderveld's group said, in reality, the voids
would be distributed more randomly -- again like Swiss cheese. With this random
distribution, the voids are not enough to explain away dark energy".

Vanderveld should have done the math.

Given the refractive index of a *void* is almost exactly 1.000000
(take it as far as you like), and the density of "ordinary"
intergalactic space is about 10 to 100 hydrogen atomes per cubic
meter:

http://en.wikipedia.org/wiki/Intergalactic_space

The density of hydrogen at STP is 2 * 6.02252x10^23 * 1000 / 22.4 =
5.37725 × 10^25 atoms per cubic meter.
The refractive index of hydrogen gas at STP is about 1.000132

http://www.kayelaby.npl.co.uk/genera...2_5/2_5_7.html

It has been shown that the refractive index of hydrogen at low
pressures is approximately linear in pressu

http://adsabs.harvard.edu/abs/1993MPLB....7..907R

from a physics religion standpoint of course so far you have
completely ignored the dark matter and dark energy contributions to
this divergent lense disscussion and perhaps would have not ignored it
if you had any idea of how to do it!

God Knows!

YOU PEOPLE can NOT of course say with any certainty that time, and
space, and matter of all types you think exist and the "physical laws"
that govern such will not just END in the next second!

and even if you could, you extrapolate the "physical laws" you think
you know back some 10,000,000,000 years and act as if YOU KNOW that
THEN they of course applied during the whole stretch of time until way
back then.

God must laugh at you and so do i!

have you no sense of humor?

it IS funny!

love and peace,
and,
peace and love,
kirk
kirk gregory czuhai
pastor/owner/CED/CEO/technical support
the
HEAVEN SENSE CHURCH
http://HeavenSense.ws
http://MountainDew.ws
http://MtDew.ws
"as a thief in the night, at a time known only to Him, He returns!"
every knee shall bend, every head shall bow, then proclaiming
JESUS CHRIST LORD
i, kirk gregory czuhai, still pray that God will choose more of you to
be
His children.
have a nice day!
peace and love,
kirk

Bluuuue Rajah wrote:
"Swiss Cheese" Model Refines Dark Energy Calculations

http://jpl.nasa.gov/news/features.cfm?feature=1988

"There is, however, one other freakish possibility that could mean a
void is creating the illusion of an accelerating universe. If our solar
system just happened to sit in the middle of a void, then that void
would distort our observations. Said Vanderveld, "It's really hard to
tell if we're in a void, but for the most part this possibility has been
ruled out.""
http://jpl.nasa.gov/news/features.cfm?feature=1988

Wasn't thing just ruled out by another set of researchers just a couple
of weeks back? I may have even provided a link to it.


Earth not center of the universe, surrounded by 'dark energy' -
sci.physics | Google Groups
http://groups.google.com/group/sci.p...ce1354eaf9b038
or,
http://tinyurl.com/c2dd6m

Yousuf Khan

I dare say the most efficient model
that could be used to describe all celestial
observations would be an information based system
like the systems used to compress data files.

ZIP, RAR, JPG, GIF, etc.

The key is to find out what compression scheme
can be used to reduce celestial observations to the smallest size,

then use another compression scheme
to get that file a little smaller,

and keep doing this
until you get down to one bit.

In the beginning there were ZERO bits,
and the world was void,
and G-d said "Let there be a bit."
and then there was ONE bit!

THE BIG BANG!!!!!

This would save a lot of the tax-payer's money,
and they could use some of their hard earned money
to get a little bit.

Everybody needs a little bit.

Especially Eric Gisse. ;-))

--
Tom Potter
http://tdp1001.spaces.live.com/
http://www.tompotter.us/misc.html
http://www.geocities.com/tdp1001/index.html
http://notsocrazyideas.blogspot.com
http://www.flickr.com/photos/tom-potter/
http://tdp1001.wiki.zoho.com
http://groups.msn.com/PotterPhotos
http://www.androcles01.pwp.blueyonde...ingleberry.htm

On Feb 3, 3:06*am, "Tom Potter" wrote:
I dare say the most efficient model
that could be used to describe all celestial
observations would be an information based system
like the systems used to compress data files.

ZIP, RAR, JPG, GIF, etc.

The key is to find out what compression scheme
can be used to reduce celestial observations to the smallest size,

then use another compression scheme
to get that file a little smaller,

and keep doing this
until you get down to one bit.

In the beginning there were ZERO bits,
and the world was void,
and G-d said "Let there be a bit."
and then there was ONE bit!

THE BIG BANG!!!!!

This would save a lot of the tax-payer's money,
and they could use some of their hard earned money
to get a little bit.

Everybody needs a little bit.

Especially Eric Gisse. *;-))

--
Tom Potterhttp://tdp1001.spaces.live.com/http://www.tompotter.us/misc.htmlhttp://www.geocities.com/tdp1001/index.htmlhttp://notsocrazyideas.blogspot..comhttp://www.flickr.com/photos/tom-potter/http://tdp1001.wiki.zoho.comhttp://groups.msn.com/PotterPhotoshttp://www.androcles01.pwp.blueyonder.co.uk/dingleberry.htm

Christ! YOU know, it ain't easy ...
http://www.altelco.net/~lovekgc/kam.jpg
http://kirkgregoryczuhai.ws
p.s.
i donnut go fishin' anymo 'cause i am afraid of the mosquitos !