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| lavender |
 Posted: Mon Jun 23, 2008 9:56 pm Post subject: our galaxy |
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Forum Freshman
Joined: 22 Jun 2008
Posts: 35
Location: elko nv
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| what's outside of the milkyway |
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| Cold Fusion |
| Posted: Mon Jun 23, 2008 11:02 pm Post subject: |
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Forum Ph.D.
Joined: 10 Apr 2007
Posts: 747
Location: In the circuitous haze of my mind
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stuff
_________________
Forget all that you know, achievements can only be accomplished by starting from nothing and selectively applying facts that are purely objective and absolutely necessary.
"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."
"Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"
-Einstein
http://boinc.berkeley.edu/download.php
Use your computing strength for science!
Last edited by Cold Fusion on Tue Jun 24, 2008 3:34 pm; edited 3 times in total |
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| marnixR |
| Posted: Tue Jun 24, 2008 12:25 am Post subject: |
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Forum Cosmic Wizard
Joined: 10 Apr 2007
Posts: 2401
Location: Cardiff, Wales
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other galaxies, interstellar clouds + lots of empty space
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if you find this place too crowded or too confrontational, how about trying Philosophorum,
the amicable forum where small is beautiful and even the trolls are intelligent
biology without evolution is but stamp collecting |
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| BumFluff |
| Posted: Tue Jun 24, 2008 6:07 am Post subject: |
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Forum Senior
Joined: 06 Mar 2008
Posts: 380
Location: Canada
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mostly dark matter though
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"The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt" - Bertrand Russell |
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| Arch2008 |
| Posted: Tue Jun 24, 2008 8:21 am Post subject: From the WMAP Survey |
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Forum Sophomore
Joined: 01 Apr 2008
Posts: 178
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| "The contents of the Universe include 4% atoms (ordinary matter), 23% of an unknown type of dark matter, and 73% of a mysterious dark energy." |
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| Cyberia |
| Posted: Fri Jul 04, 2008 8:45 am Post subject: Re: our galaxy |
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Forum Freshman
Joined: 14 May 2008
Posts: 27
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| lavender wrote: |
| what's outside of the milkyway |
Our galaxy is just one of 100,000,000,000 galaxies. Between them, there is often millions of light years of "space". Our galaxy does have two tiny satellite galaxies.
Our neighbourhood:
http://en.wikipedia.org/wiki/Local_Group |
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| SolomonGrundy |
| Posted: Fri Jul 04, 2008 2:33 pm Post subject: |
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Forum Junior
Joined: 09 Sep 2007
Posts: 243
Location: USA
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what's outside of the milkyway ?
life.
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Solomon Grundy
In 1944, this creature rose from the swamp, with tremendous strength and some dormant memories that for example allowed him to speak English, but not knowing what he was, and not remembering Cyrus Gold or his fate. Wandering throughout the swamp, he encountered two escaped criminals, killed them, and took their clothes. When they asked him his name, he simply muttered that he had been born on Monday. Reminded of an old nursery rhyme about a man born on Monday, the thugs named the creature "Solomon Grundy". |
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| Raymond K |
| Posted: Mon Jul 07, 2008 7:55 am Post subject: Re: From the WMAP Survey |
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Forum Sophomore
Joined: 20 Feb 2008
Posts: 179
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| Arch2008 wrote: |
| "The contents of the Universe include 4% atoms (ordinary matter), 23% of an unknown type of dark matter, and 73% of a mysterious dark energy." |
Do they call it dark because it is not observable yet? Just mathmatically placed? |
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| Arch2008 |
| Posted: Mon Jul 07, 2008 10:24 am Post subject: |
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Forum Sophomore
Joined: 01 Apr 2008
Posts: 178
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The Wilkinson Microwave Anisotropy Probe (WMAP) shed some light on dark matter. Apparently it was here right from the beginning of the universe. Some candidates for DM are MACHOS (MAssive Compact HalO objectS) and WIMPS (Weakly Interactive Massive ParticleS). MACHOS are described as brown dwarf stars or minor black holes in the halo of a galaxy, whereas WIMPS are simply nuclear particles that interact weakly with the electromagnetic force, so they can essentially float right through your molecules and do not reflect light, etc. Since there were no stars at the beginning of the universe, I think that WIMPS are the most likely candidate.
Scientists added up an approximate mass of the universe and measured the increase in acceleration in the expansion of the universe since the Big Bang. They then calculated how much energy it would take to give the mass of the universe this acceleration. The result is called Dark Energy. We really know very little about it. |
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| Jim Colyer |
| Posted: Mon Jul 07, 2008 11:30 am Post subject: |
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Forum Freshman
Joined: 13 Jan 2005
Posts: 76
Location: Nashville
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Can someone prove to me that there is such a thing as dark matter?
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Jim Colyer wrote Save The Planet |
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