| Topic: |
Religions > Atheism |
| User: |
"maff" |
| Date: |
09 Jan 2007 04:24:50 AM |
| Object: |
Dark matter |
What is dark matter?
http://www.guardian.co.uk/g2/story/0,,1985763,00.html
Ian Sample
Tuesday January 9, 2007
The Guardian
You have to hand it to scientists. While romantics gaze upon the
heavens with wonder, astrophysicists are more likely to step away from
their telescopes and ask: "Is that it?" But they have a point. Even
with the most advanced telescopes, we can see only a fifth of the
matter that makes up the universe. The rest - dubbed "dark matter" for
its refusal to reveal itself - is mysterious, invisible material that
forms a celestial skeleton around which the visible planets and stars
assemble.
Dark matter
http://news.google.com/news?num=100&hl=en&lr=&safe=off&q=%22Dark%20matter%22&btnG=Search&ie=UTF-8&oe=UTF-8&sa=N&tab=gn
http://www.google.com/search?num=100&hl=en&lr=&ie=UTF-8&oe=UTF-8&q=%22Dark+matter%22&sa=N&tab=nw
http://blogsearch.google.com/blogsearch?num=100&hl=en&lr=&ie=UTF-8&oe=UTF-8&q=%22Dark%20matter%22&sa=N&tab=wb
http://www.google.com/search?q=%22Dark+matter%22&btnG=Search+Directory&hl=en&cat=gwd%2FTop
http://groups.google.com/groups?q=%22Dark+matter%22&start=0&scoring=d&num=100&hl=en&lr=&safe=off&ie=UTF-8&oe=UTF-8&
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| User: "" |
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| Title: Re: Dark matter |
16 Jan 2007 12:58:34 PM |
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On 9 Jan 2007 02:24:50 -0800, "maff" <maff91@yahoo.com> wrote:
What is dark matter?
Probably anything that doesn't emit or reflect enough
electromagnetic radiation that we can observe it.
http://www.guardian.co.uk/g2/story/0,,1985763,00.html
Ian Sample
Tuesday January 9, 2007
The Guardian
You have to hand it to scientists. While romantics gaze upon the
heavens with wonder, astrophysicists are more likely to step away from
their telescopes and ask: "Is that it?" But they have a point. Even
with the most advanced telescopes, we can see only a fifth of the
matter that makes up the universe. The rest - dubbed "dark matter" for
its refusal to reveal itself - is mysterious, invisible material that
forms a celestial skeleton around which the visible planets and stars
assemble.
I guess it shouldn't be too surprising that most of the matter in the
Universe is not yet visible to humans. With as little money as we spend
on the space program it's no wonder humans aren't any further along
than we are. It's pathetic.
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| User: "Uncle Clover" |
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| Title: Re: Dark matter |
16 Jan 2007 06:51:10 PM |
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On Tue, 16 Jan 2007 13:58:34 -0500, dh@. wrote:
<snip>
I guess it shouldn't be too surprising that most of the matter in the
Universe is not yet visible to humans.
I may misunderstand you. Is this because it's just too faint to be detected in
the relative "loudness" of the larger, more energetic bodies in space (stars,
galaxies, etc...)? Or is it something we wouldn't be able to see even if we
were right on top of it? I assume you meant the former, but it would be quite
interesting if you to any degree could also state the latter. :-)
--
L8r,
Uncle Clover
___________________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Beauty is where you see it.
___________________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| User: "Ben Kaufman" |
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| Title: Re: Dark matter |
16 Jan 2007 07:25:00 PM |
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On Tue, 16 Jan 2007 19:51:10 -0500, Uncle Clover <UncleClover@SpamMeNot.com>
wrote:
On Tue, 16 Jan 2007 13:58:34 -0500, dh@. wrote:
<snip>
I guess it shouldn't be too surprising that most of the matter in the
Universe is not yet visible to humans.
I may misunderstand you. Is this because it's just too faint to be detected in
the relative "loudness" of the larger, more energetic bodies in space (stars,
galaxies, etc...)? Or is it something we wouldn't be able to see even if we
were right on top of it? I assume you meant the former, but it would be quite
interesting if you to any degree could also state the latter. :-)
The latter, it's not the same stuff.
http://en.wikipedia.org/wiki/Dark_matter
Ben
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| User: "Uncle Clover" |
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| Title: Re: Dark matter |
16 Jan 2007 07:28:41 PM |
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On Tue, 16 Jan 2007 20:25:00 -0500, Ben Kaufman
<spaXm-mXe-anXd-paXy-5000-dollars@pobox.com> wrote:
On Tue, 16 Jan 2007 19:51:10 -0500, Uncle Clover <UncleClover@SpamMeNot.com>
wrote:
On Tue, 16 Jan 2007 13:58:34 -0500, dh@. wrote:
<snip>
I guess it shouldn't be too surprising that most of the matter in the
Universe is not yet visible to humans.
I may misunderstand you. Is this because it's just too faint to be detected in
the relative "loudness" of the larger, more energetic bodies in space (stars,
galaxies, etc...)? Or is it something we wouldn't be able to see even if we
were right on top of it? I assume you meant the former, but it would be quite
interesting if you to any degree could also state the latter. :-)
The latter, it's not the same stuff.
http://en.wikipedia.org/wiki/Dark_matter
_Excellent_! Thanks, dude! S/h thought to look Wiki up first. :-)
--
L8r,
Uncle Clover
___________________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Beauty is where you see it.
___________________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| User: "" |
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| Title: Re: Dark matter |
18 Jan 2007 01:35:26 PM |
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On Tue, 16 Jan 2007 19:51:10 -0500, Uncle Clover <UncleClover@SpamMeNot.com> wrote:
On Tue, 16 Jan 2007 13:58:34 -0500, dh@. wrote:
<snip>
I guess it shouldn't be too surprising that most of the matter in the
Universe is not yet visible to humans.
I may misunderstand you. Is this because it's just too faint to be detected in
the relative "loudness" of the larger, more energetic bodies in space (stars,
galaxies, etc...)?
In many cases I feel sure that's a significant aspect. In others no.
Or is it something we wouldn't be able to see even if we
were right on top of it? I assume you meant the former, but it would be quite
interesting if you to any degree could also state the latter. :-)
Being unable to see something means either it's not reflecting
or/and emitting enough light here that we can detect it. There's
a lot of stuff out there that we could see if we were on top of it
with a flashlight, but it still doesn't reflect or emit enough that
we can see it from light years (or days, or hours...) away. Then
there are black holes which if really exist probably account for
a tremendous amount of dark matter themselves, plus whatever
light they absorb from other objects preventing us from being
able to see them. There are also huge gas clouds that don't
emit light or have enough stars close by to reflect sufficient
light for us to be able to see them, but they still have mass.
They also can absorb and block light from objects that would
otherwise reach us. There are lots of ways for matter to exist
without being visible to us, and if we don't get our ***** together
eventually some of it is going to strike the Earth and screw things
up in horrific ways.
--
L8r,
Uncle Clover
___________________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Beauty is where you see it.
___________________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Yes, and sometimes it helps us understand other things
just by being able to see it. Check out these nebulae:
http://www.novaspace.com/POSTERS/PHOTO/Lagoon.jpeg
http://chronicle.uchicago.edu/050303/hubble-nebula.jpg
http://63.251.54.141/images/KeyholeNebula.jpg
http://www.noao.edu/image_gallery/images/d6/04086x.jpg
http://www.esa.int/images/hst_3_l.jpg
http://www.asiaa.sinica.edu.tw/outreach/news/old/2003/4985.jpg
The are bright enough for us to see, but from them we can
also get an idea how there could be plenty of similar situations
in which the material doesn't emit enough light of its own,
nor is there enough light from other sources refelected from
it, to make it visible to us.
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| User: "Budikka666" |
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| Title: Re: Dark matter |
16 Jan 2007 07:43:09 PM |
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maff wrote:
What is dark matter?
http://www.guardian.co.uk/g2/story/0,,1985763,00.html
Ian Sample
Tuesday January 9, 2007
The Guardian
You have to hand it to scientists. While romantics gaze upon the
heavens with wonder, astrophysicists are more likely to step away from
their telescopes and ask: "Is that it?" But they have a point. Even
with the most advanced telescopes, we can see only a fifth of the
matter that makes up the universe. The rest - dubbed "dark matter" for
its refusal to reveal itself - is mysterious, invisible material that
forms a celestial skeleton around which the visible planets and stars
assemble.
Dark matter
http://news.google.com/news?num=100&hl=en&lr=&safe=off&q=%22Dark%20matter%22&btnG=Search&ie=UTF-8&oe=UTF-8&sa=N&tab=gn
http://www.google.com/search?num=100&hl=en&lr=&ie=UTF-8&oe=UTF-8&q=%22Dark+matter%22&sa=N&tab=nw
http://blogsearch.google.com/blogsearch?num=100&hl=en&lr=&ie=UTF-8&oe=UTF-8&q=%22Dark%20matter%22&sa=N&tab=wb
http://www.google.com/search?q=%22Dark+matter%22&btnG=Search+Directory&hl=en&cat=gwd%2FTop
http://groups.google.com/groups?q=%22Dark+matter%22&start=0&scoring=d&num=100&hl=en&lr=&safe=off&ie=UTF-8&oe=UTF-8&
Pshaw dark matter! 75% of the content of the universe is actually dark
energy!
http://tinyurl.com/2skffw
Budikka
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