Results 1 to 7 of 7
  1. #1
    Majik1911's Avatar
    Majik1911 is offline Main Sequence
    Points: 7,497, Level: 60
    Level completed: 74%, Points required for next Level: 53
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    Mar 2010
    Location
    Northern MN, USA
    Posts
    141
    Points
    7,497
    Level
    60
    Thanks
    39
    Thanked 22x 14 Posts

    Default Hubble and Dark Matter



    [ame=http://www.youtube.com/watch?v=j3pY7lVZJpk&feature=related]YouTube - Hubble finds ring of dark matter[/ame]

    So I just happened across this on youtube. Now I know nothing on youtube is very credible, but im wondering if this has ANY truth to it.

    So now, I think this is basically a zoom-in on Hubble's new ultra deep-space picture. Once they reach that point, there is some sort of overlay placed on the image i THINK.

    My question is... Seen as how Hubble is an OPTICAL telescope, wouldn't it be physically impossible for it to see dark matter? Or is there some sort of way for an optical scope to detect it.

    I believe I heard something recently about using gravitational waves to detect dark matter, but as we cannot detect those either, it seems a moot point.

    Just wondering!

    Thanks, and Clear Skies!
    In Soviet Russia, Celestron NexStar 8se telescope looks through YOU!


    -Zach C.

  2. #2
    psonice's Avatar
    psonice is offline HYPER GIANT
    Points: 14,658, Level: 83
    Level completed: 46%, Points required for next Level: 192
    Overall activity: 0%
    Join Date
    Jul 2009
    Location
    Warrington, UK
    Posts
    1,643
    Points
    14,658
    Level
    83
    Thanks
    248
    Thanked 599x 420 Posts

    Default

    Dunno, but the only way to detect dark matter so far is to observe the effect it has on other matter.

    That image seems to show a gravity lens, possibly in a torus shape, although it's hard to tell from youtube quality pictures. If there's a massive amount of something we can't see, in an apparently empty bit of space, in a ring shape.. well, maybe it is a ring of dark matter?

  3. #3
    awase149's Avatar
    awase149 is offline Main Sequence
    Points: 7,451, Level: 60
    Level completed: 51%, Points required for next Level: 99
    Overall activity: 0%
    Achievements:
    10 Days registered365 Days+ Registered Achievement!First 1000 Experience Points200+ Posts Achievement!750 Days+ Registered Achievement!
    Join Date
    Apr 2010
    Location
    Japan
    Posts
    113
    Points
    7,451
    Level
    60
    Thanks
    69
    Thanked 54x 32 Posts

    Default

    This video is from the NASA Hubble Site (so I don't think it is faked). Here is a link:

    HubbleSite - NewsCenter - Hubble Finds Ring of Dark Matter (05/15/2007) - Introduction

    Explanation from the NASA site:

    Astronomers using NASA's Hubble Space Telescope have discovered a ghostly ring of dark matter that formed long ago during a titanic collision between two massive galaxy clusters. The ring's discovery is among the strongest evidence yet that dark matter exists. Astronomers have long suspected the existence of the invisible substance as the source of additional gravity that holds together galaxy clusters. Such clusters would fly apart if they relied only on the gravity from their visible stars. Although astronomers don't know what dark matter is made of, they hypothesize that it is a type of elementary particle that pervades the universe.

    This Hubble composite image shows the ring of dark matter in the galaxy cluster Cl 0024+17. The ring-like structure is evident in the blue map of the cluster's dark matter distribution. The map was derived from Hubble observations of how the gravity of the cluster Cl 0024+17 distorts the light of more distant galaxies, an optical illusion called gravitational lensing. Although astronomers cannot see dark matter, they can infer its existence by mapping the distorted shapes of the background galaxies. The map is superimposed on a Hubble Advanced Camera for Surveys image of the cluster taken in November 2004.


  4. The Following 2 Users Say Thank You to awase149 For This Useful Post:

    Majik1911 (04-22-2010),PBalu (04-23-2010)

  5. #4
    Majik1911's Avatar
    Majik1911 is offline Main Sequence
    Points: 7,497, Level: 60
    Level completed: 74%, Points required for next Level: 53
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    Mar 2010
    Location
    Northern MN, USA
    Posts
    141
    Points
    7,497
    Level
    60
    Thanks
    39
    Thanked 22x 14 Posts

    Default

    Ahh, that seems to make a bit of sense! Thanks Awase149. So they THINK they know its there, but there not actually seeing it. I suppose no matter what spectrum a scope is looking in, they wouldn't be able to see dark matter anyhow.
    In Soviet Russia, Celestron NexStar 8se telescope looks through YOU!


    -Zach C.

  6. #5
    timegazer24's Avatar
    timegazer24 is offline Bright Giants
    Points: 9,417, Level: 67
    Level completed: 23%, Points required for next Level: 233
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience PointsGot three Friends20+ Friends Achievement!365 Days+ Registered Achievement!
    Join Date
    Mar 2010
    Location
    Arkansas
    Posts
    489
    Points
    9,417
    Level
    67
    Thanks
    393
    Thanked 106x 85 Posts

    Default

    A very interesting thread, thanks

  7. #6
    Agent420's Avatar
    Agent420 is offline Banned
    Points: 10,095, Level: 69
    Level completed: 49%, Points required for next Level: 155
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!365 Days+ Registered Achievement!First 1000 Experience Points750 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    Nov 2009
    Location
    Portland, Oregon
    Posts
    180
    Points
    10,095
    Level
    69
    Thanks
    62
    Thanked 31x 23 Posts

    Default

    Speculation. They don't know what it is so they say it is something else they don't know what is. I'll pass.

  8. #7
    Widdekind's Avatar
    Widdekind is offline SUPER GIANT
    Points: 14,643, Level: 83
    Level completed: 41%, Points required for next Level: 207
    Overall activity: 0%
    Join Date
    Dec 2008
    Posts
    829
    Points
    14,643
    Level
    83
    Thanks
    42
    Thanked 247x 177 Posts

    Default

    If Neutrinos have a non-zero rest-mass, perhaps of roughly 1.5 eV, then couldn't Neutrinos exist... at rest ??

    And, if so, couldn't they "clump", into "Neutrino planets" and "Neutrino stars" (as it were) ?? Could that explain Dark Matter ?

    At only ~1 eV per particle, the self-gravity of Neutrinos might be so weak, they their distribution would be continuously "stirred up", by the motions of planets & stars in galaxies. Could Earth, or our Solar System, be passing through a "thick fog" of cold, and nearly uniformly distributed, Neutrinos ??

 

 

Similar Threads

  1. Unravelling the Dark Matter - Dark Energy Paradigm
    By Surfer in forum UK Astronomy Forum
    Replies: 0
    Last Post: 03-28-2009, 02:06 PM
  2. BBC NEWS | Science/Nature | Hubble makes 3D dark matter map
    By nickw7coc@gmail.com in forum UK Astronomy Forum
    Replies: 1
    Last Post: 01-09-2007, 08:50 AM
  3. Hubble Maps the Cosmic Web of 'Clumpy' Dark Matter in 3-D
    By Sam Wormley in forum Amateur Astronomy Forum
    Replies: 0
    Last Post: 01-08-2007, 03:15 AM
  4. A Matter of Fact: NASA Finds Direct Proof of Dark Matter
    By Sam Wormley in forum Amateur Astronomy Forum
    Replies: 72
    Last Post: 08-27-2006, 10:20 PM
  5. Replies: 36
    Last Post: 10-16-2005, 03:13 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 06:32 PM.