Space/Science » in reply to re: Or it might be just gas pressure pushing everything apart

Does the Horsehead Nebula qualify as dark matter?

SDF — 5/3/2006 1:59:10 AM (archived)

I see lots of stars there, but also lots of dark gaseous clouds. The only reason we see the dark gaseous clouds is because there are lots of stars nearby. But I could easily estimate that there is 6-times as much mass in the form of non-luminous reflective gas as there is in the form of stars. Ergo, the dark matter problem IMHO is not really a problem. Astronomers just need to increase their exposure times by 6-fold to see it.

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The whole thread (35 posts)

• Dark Energy: Recent Developments - ljk - 5/2/2006 2:29:18 PM
  • Or it might be just gas pressure pushing everything apart - SDF - 5/2/2006 4:12:19 PM
    • Wasn't me! (n/t) - Tom Brosz - 5/3/2006 5:02:11 AM
    • PLEASE tell me that was tounge in cheek.... (n/t) - R.L. - 5/3/2006 3:16:50 AM
      • You spelled "tongue" incorrectly (n/t) - SDF - 5/3/2006 4:01:36 AM
        • Yup, so I did... - R.L. - 5/3/2006 8:00:47 PM
    • Yeah, and air pressure is holding the Empire State Buliding up.... - et - 5/2/2006 9:09:07 PM
      • I still think the universe has been let off it's leash. - RobVG - 5/6/2006 6:21:06 PM
      • Radiation pressure then - SDF - 5/3/2006 1:12:05 AM
        • Oh, trust me. They didn't forget that either. - et - 5/3/2006 8:32:39 PM
          • Nested black holes - SDF - 5/4/2006 3:02:15 AM
            • or maybe..... - SDF - 5/4/2006 4:48:56 AM
    • In General Relativity, (non local) speeds greater than the speed of light - David F Mayer - 5/2/2006 7:43:35 PM
    • re: Or it might be just gas pressure pushing everything apart - ljk - 5/2/2006 6:05:54 PM
      • Does the Horsehead Nebula qualify as dark matter? - SDF - 5/3/2006 1:59:10 AM
        • No... - SteveS - 5/3/2006 1:13:05 PM
          • That doesn't really answer my question, I'll clarify - SDF - 5/3/2006 1:24:52 PM
            • re: That doesn't really answer my question, I'll clarify - Marcia - 5/4/2006 1:12:51 AM
            • It MIGHT 'baryonic dark matter' - R.L. - 5/3/2006 9:31:27 PM
              • re: It MIGHT 'baryonic dark matter' - Marcia - 5/5/2006 4:42:34 PM
              • That should read: " It MIGHT be called 'baryonic dark matter' " (n/t) - R.L. - 5/3/2006 9:32:39 PM
            • The difference - SteveS - 5/3/2006 8:14:58 PM
              • re: This one shows better... - SteveS - 5/3/2006 9:28:26 PM
                • I see dark matter - SDF - 5/4/2006 2:58:59 AM
                  • re: I see dark matter - SteveS - 5/4/2006 1:28:02 PM
                    • The nebula is made of matter is it not? If it is a dark nebula, then it is dark matter! (n/t) - SDF - 5/4/2006 3:39:00 PM
                      • Ohhh...I get it... - SteveS - 5/4/2006 6:16:03 PM
                        • I'm not yanking your chain. Check out these images. - SDF - 5/5/2006 5:23:53 AM
                          • Detection of the ISW effect and corresponding dark energy constraints - LJK - 5/5/2006 8:30:12 PM
                            • Cosmological Acceleration: Dark Energy or Modified Gravity? - ljk - 5/9/2006 8:25:08 PM
        • astro satire - phil - 5/3/2006 12:37:38 PM
          • If it pays more..... I'm in! (n/t) - SDF - 5/3/2006 2:58:31 PM
            • Lambda Cold Dark Matter (LCDM) model of galaxy formation and evolution - ljk - 5/10/2006 3:15:26 PM
              • Inflation, dark matter and dark energy in the string landscape - ljk - 5/10/2006 3:17:51 PM
                • Constraints on Sterile Neutrino Dark Matter - LJK - 5/12/2006 5:03:52 PM