Free Republic
Browse · Search
News/Activism
Topics · Post Article

Skip to comments.

Cosmic Microwave Background Radiation's Polarization Detected at Last
Scientific American ^ | 19 December 2002 | Sarah Graham

Posted on 12/20/2002 9:19:45 AM PST by PatrickHenry

Although it was discovered less than 40 years ago, the cosmic microwave background (CMB) radiation has been around a lot longer than that. A relic from the early days of the Universe more than 14 billion years ago, the CMB is the oldest radiation on record. Current cosmological models posit that the CMB should be slightly polarized but this property has never been observed--until now. Researchers have successfully detected the CMB's polarization and found that it agrees with the theoretical estimates.

Erik Leitch and John Kovac of the University of Chicago and their colleagues used the Degree Angular Scale Interferometer (DASI), which is located at the Amundsen-Scott South Pole Station, to study the CMB radiation. Over a two-year period, this array of radio telescopes collected radiation signals coming from deep space in two patches of blank sky. The resulting 271 days worth of useable data revealed the light's polarization (the direction in which the light's field oscillates as it travels toward an observer on the ground). Writing in the journal Nature, the scientists report that the CMB radiation's level and spatial distribution are in excellent agreement with the predictions of the standard theory. "If the light hadn't been polarized, that would mean that we would have to throw out our whole model of how we understand the physics of the early universe," Leitch notes. In an accompanying commentary, Matias Zaldarriaga of New York University calls the findings "both a remarkable technical achievement and a wonderful consistency check for the theory."


TOPICS: Culture/Society; Miscellaneous; Philosophy
KEYWORDS: bigbang; cosmology; crevolist; physics; universe
Navigation: use the links below to view more comments.
first previous 1-20 ... 81-100101-120121-140141-160 next last
To: RightWhale
Every metaphor is a trap-- ether, photons, phlogiston...

Make the math work and reality will map the numbers.

So far, anyways. ;^)
101 posted on 12/20/2002 12:15:14 PM PST by headsonpikes
[ Post Reply | Private Reply | To 70 | View Replies]

To: PatrickHenry
Does this explain why I can see fish better when I have my polarized sun glasses on?

I'd rather broil them, than microwave, though.

(Catchy name, BTW - back in graded school, a bio. on PH was the first book of over 300 pp. that I ever read --and enjoyed it even....)
102 posted on 12/20/2002 12:19:52 PM PST by unspun
[ Post Reply | Private Reply | To 2 | View Replies]

To: biblewonk
Why are we here? There is a single question that can be asked on all of those levels and more.

Yes, but to confuse the levels serves neither philosophy/religion nor science. Your denigration of science does not make your philosophy attractive.

103 posted on 12/20/2002 12:19:56 PM PST by Faraday
[ Post Reply | Private Reply | To 99 | View Replies]

To: BikerNYC
When time periods get small enough, the very nature of before and after make no sense because on uncertainty principles.

Which doesn't bear on larger periods of time, I take it. Or should we use the uncertainty principle to understand that everything in the cosmos, past, present, and future, is somehow happening simultaneously?

104 posted on 12/20/2002 12:27:23 PM PST by Oberon
[ Post Reply | Private Reply | To 100 | View Replies]

To: unspun
Does this explain why I can see fish better when I have my polarized sun glasses on?

It's true, but not commonly known. Now, if the polaroid sunglasses would make the fish take the bait, so much the better.

105 posted on 12/20/2002 12:35:35 PM PST by RightWhale
[ Post Reply | Private Reply | To 102 | View Replies]

To: nanrod
nanrod said: "...having everything, all the mass, energy, and everything in the universe collapsed to a point would be the ultimate black hole. "

Hawking predicted "radiation" from black holes due to the creation of virtual particle-antiparticle pairs at the event horizon. One of the pair would be swept into the black hole and the other would move away. In this way, black holes "evaporate" over time.

If the entire universe collapsed into a small enough region, the "Hawking radiation" which would result would probably be of sufficient magnitude to reverse the collapse, just as the Big Bang theory proposes.

For those who believe in a Supreme Being, it is only necessary to believe that that Being would choose to create a universe with an apparent history going back billions of years which is consistent with scientific observation. Is that really so difficult that a Supreme Being could not accomplish it?

For all I know directly, the entire universe was created when I was two years old. Every occurrence older than that was only reported to me by others.

106 posted on 12/20/2002 12:36:23 PM PST by William Tell
[ Post Reply | Private Reply | To 38 | View Replies]

To: biblewonk
We will never know why simple things like gravity and magnetism work let alone the real natural mysteries of the universe.

BW, I'm a disciple of our Lord too, but I've got a problem with this. Just because there's a God doesn't mean science isn't worth pursuing. And your statement above... the one I quoted... reminds me of what people used to say about air, or the mathematical concept of zero, or the human circulatory system.

Just because "Why?" is the predominate question doesn't mean "How?" is pointless.

107 posted on 12/20/2002 12:36:43 PM PST by Oberon
[ Post Reply | Private Reply | To 61 | View Replies]

To: RightWhale
"Does this explain why I can see fish better when I have my polarized sun glasses on?

It's true, but not commonly known. Now, if the polaroid sunglasses would make the fish take the bait, so much the better."

I think this is one of those things that "I'd like to study up on some day." ;-` I should really catch up on my fishing, maybe, first.
108 posted on 12/20/2002 12:38:27 PM PST by unspun
[ Post Reply | Private Reply | To 105 | View Replies]

To: biblewonk
What caused the big bang? 23 posted on 12/20/2002 1:31 PM EST by biblewonk
Let ... THERE (right there, where/when the bubble began the expansion) ... be light. The Creator issued the command that brought about a conjunction of space and time, two of His dimensional qualities, and started the entire shebang. Later, much later by our reckoning, He involved another of His dimensional qualities, LIFE, and the lifeless took on awareness. Even later, He issued another integration of a dimensional quality He possesses, and spirit entered into the mixes of dimensional expressions.
109 posted on 12/20/2002 12:40:33 PM PST by MHGinTN
[ Post Reply | Private Reply | To 23 | View Replies]

To: Oberon
Just because there's a God doesn't mean science isn't worth pursuing.

I never said that, but in titus 6:20 the God points out that there are things passing themselves off as science. That's pretty much what we have here when we see a 1 part per 100,000 difference in the distribution of background radiation at 2.7ish degrees K and conclude that it supports the big bang theory.

110 posted on 12/20/2002 12:41:13 PM PST by biblewonk
[ Post Reply | Private Reply | To 107 | View Replies]

To: RightWhale
This happens as relief to stress in the cosmos and it will never end. Our own personal BB ocurred 14 billion years ago. Nothing special. Current thought on the subject. 40 posted on 12/20/2002 1:56 PM EST by RightWhale

Questions for you, RW: these stress relievers occur in the spacetime bubble of our reality or outside of it, then intersect our spacetime to then disappear? Our 'BB' brought space and time into being, or the 'BB' happened in an already existing spacetime background?

111 posted on 12/20/2002 12:49:53 PM PST by MHGinTN
[ Post Reply | Private Reply | To 40 | View Replies]

To: biblewonk
That's pretty much what we have here when we see a 1 part per 100,000 difference in the distribution of background radiation at 2.7ish degrees K and conclude that it supports the big bang theory.

Well, maybe it does, and maybe it doesn't... but if you don't mind my asking, do you have the qualifications to make that call?

The question is kind of irrelevant anyhow, because whether the universe Big Banged or not, science can get no grip on the whole notion of why it happened. It's not what science is about. By the same token, I find scientists who disbelieve in a Creator on the basis of their work to be as laughable as a mechanic who disbelieves in Henry Ford. "Been lookin' for his fingerprints for years," he might say. "Never found 'em... NOT EVEN ON FORDS!!!"

112 posted on 12/20/2002 12:54:27 PM PST by Oberon
[ Post Reply | Private Reply | To 110 | View Replies]

To: Oberon
Or should we use the uncertainty principle to understand that everything in the cosmos, past, present, and future, is somehow happening simultaneously? 104 posted on 12/20/2002 3:27 PM EST by Oberon Not because of the uncertainty principle, but if you 'stood' outside of our spacetime bubble, it would appear that past, present, and future exist simultaneoulsy. I like the analogy of a line, a plane, and a hemisphere to visualize past, present, and future. Because we exist on the plane of present, our 'view' is limited to the plane, while in our past, only one intersection with the plane is possible, from our reckoning, and from the point on the plane (our individual where/when) that is our now, think of how many vectors many be extended off of the plane into the hemisphere ... and each of these vectors will be the linear past when we move to the next present plane, and the next and the next.
113 posted on 12/20/2002 12:57:12 PM PST by MHGinTN
[ Post Reply | Private Reply | To 104 | View Replies]

To: Oberon
Well, maybe it does, and maybe it doesn't... but if you don't mind my asking, do you have the qualifications to make that call?

Qualifications! That's funny. Jesus and John the Baptist are not qualified to preach in most of the Christian churches in this country. College is a joke, been there and see the results of "higher education" in my peers.

114 posted on 12/20/2002 12:59:39 PM PST by biblewonk
[ Post Reply | Private Reply | To 112 | View Replies]

To: MHGinTN
these stress relievers occur in the spacetime bubble of our reality

Would be inside our continuum, and then something clicks and it's gone, taking the stress with it. But whatever causes the stress is still operating, so stress continues to build until *Pop* it's gone again. Like sand bars in the river.

115 posted on 12/20/2002 1:06:03 PM PST by RightWhale
[ Post Reply | Private Reply | To 111 | View Replies]

To: biblewonk
College is a joke, been there and see the results of "higher education" in my peers.

On the basis of our brief interaction I would guess that you have been both resolute and successful in resisting its insidious effects.

116 posted on 12/20/2002 1:11:15 PM PST by Oberon
[ Post Reply | Private Reply | To 114 | View Replies]

To: MHGinTN
Not because of the uncertainty principle, but if you 'stood' outside of our spacetime bubble, it would appear that past, present, and future exist simultaneoulsy.

You'd have to understand my question in the context of my ongoing conversation with RightWhale, I'm afraid. But I get your meaning.

117 posted on 12/20/2002 1:14:04 PM PST by Oberon
[ Post Reply | Private Reply | To 113 | View Replies]

To: nanrod
The notion of a big bang is way beyond ridiculous.

Then why do you suppose that so many of the most brilliant minds in science have devoted their lives to studying it?

Several people have mentioned this on FR but the evos here do not appear capable of absorbing it or handling it: having everything, all the mass, energy, and everything in the universe collapsed to a point would be the ultimate black hole.

Tell me, what is the total energy of the universe? What would you say if I told you that it is something very close to zero?

Nothing could bang its way out of that, big, little, or otherwise.

What makes you think we are out of that? According to inflationary cosmology, we are in a black hole right now.

The whole notion is idiotic and PatrickHenry and several of these people who make all the noise on FR on these topics are basically a bunch of idiots.

It's aggressively ignorant statements like that that make FreeRepublic--and conservatism in general--into a laughing stock.

118 posted on 12/20/2002 1:24:32 PM PST by Physicist
[ Post Reply | Private Reply | To 38 | View Replies]

To: Physicist
Always a pleasure to read what you have to say, Physicist.
119 posted on 12/20/2002 1:35:05 PM PST by BikerNYC
[ Post Reply | Private Reply | To 118 | View Replies]

To: nanrod
How about the great chicken created the universe 100,000 years ago today? That's not really GOOD, but it's better than the "big bang"; that isn't asking for much.

How about the universe has simply always been around and will always be around? Why do you need these beginning myths? Oh, the "expanding universe" you say? Turns out, at least from what I hear, that one's a myth too.

120 posted on 12/20/2002 1:58:41 PM PST by titanmike
[ Post Reply | Private Reply | To 71 | View Replies]


Navigation: use the links below to view more comments.
first previous 1-20 ... 81-100101-120121-140141-160 next last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
News/Activism
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson