can dark matter be touched?

[onesimple]

There is no dark matter at all.<br /><br />Stars moving far a way from galaksy centrum, but they dont do that relativity, because stars expandind same way all a time.<br /><br />In galaksy centrum are very big expanding energycentrum who open energywaves who have atoms personality.<br /><br />Thats why near galaksys centrums very big black holes born still new stars.<br /><br />And thats the way it is.<br /><br />Savor<br /><br /><img src="/images/icons/smile.gif" /> <img src="/images/icons/wink.gif" /> <img src="/images/icons/smile.gif" />

 

[Saiph]

First, the idea that "dark" is a synonym for unknown, unobserved, etc is incorrect. It merely means it does not give off light, nor interact with light.<br /><br />Also, Neutrinos <i>are</i> a form of dark matter, specifically under the category of "hot" dark matter (meaning highly mobile from the definition of temperature).<br /><br />They are electrically neutral, and so do not interact with light. They do interact with matter, but <i>only</i> from direct collisions. The flash of light produced in neutrino detectors is <i>not</i> due to the neutrino, but from the impacted atom(s) creating a cascade effect as they plow through other atoms.<br /><br />Sadly, "hot" dark matter does not fit observatoins completely, as galactic rotation and interaction models require large amounts of clumped or "cold" dark matter to float around (like hydrogen nebulae).<br /><br />The presence of dark matter is, primarily, detected indirectly by how it affects it's surroundings. We see galaxies move in ways that can't be explained by the gravitational force of the observed matter (the matter that gives off light, and the matter that occludes it).<br /><br />Now, there are factions in the field that are pursuing a different alternative than dark matter, and those are primarily MOND proponents that say gravity behaves a bit differently than we expect on large scales. Unfortunately MOND keeps running into various observational hurdles that sends it back to the drawing board every 5 years or so.<br /><br />So, Dark matter, in some form does exist, it does explain some of what we see, but it isn't positive if it is <i>the</i> answer yet. <div class="Discussion_UserSignature"> <p align="center"><font color="#c0c0c0"><br /></font></p><p align="center"><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">----</font></em></font><font color="#666699">SaiphMOD@gmail.com </font><font color="#999999"><em><font size="1">-------------------</font></em></font></p><p><font color="#999999"><em><font size="1">"This is my Timey Wimey Detector.  Goes "bing" when there's stuff.  It also fries eggs at 30 paces, wether you want it to or not actually.  I've learned to stay away from hens: It's not pretty when they blow" -- </font></em></font><font size="1" color="#999999">The Tenth Doctor, "Blink"</font></p> </div>