Notices
Results 1 to 7 of 7

Thread: why cant we see the local interstellar cloud?

  1. #1 why cant we see the local interstellar cloud? 
    New Member
    Join Date
    Mar 2013
    Posts
    3
    this questions has been bugging me for a time now, and i asked my science teacher and he doesn't know. the question is; if we are currently traveling through the local cloud (the gas/ dust cloud our solar system is passing by and all the clouds near us(i.e the g-cloud) why when we go to space its very clean and clear and when we look up in the sky, shouldn't we be covered in dust/ gas particles that font let us see space. if i didn't explain it clear enough tell me and ill try to re-frase the question


    Reply With Quote  
     

  2.  
     

  3. #2  
    Universal Mind John Galt's Avatar
    Join Date
    Jul 2005
    Posts
    14,168
    The question is clear venomkiler, but the premise for it is not. To the best of my understanding the nearest GMC (Giant Molecular Cloud), from which many new stars form, is the Orion complex. This is 500 parsecs (1,600 light years) distant. There are some smaller clouds that are somewhat closer, but even these are many tens or even hundreds of light years distant.

    I also have no idea what the g-cloud is. Did you mean gas cloud. If not could you provide some more information? Where did you here of it?

    So the simple answer to your question is that we do not experience obscuration as we are not currently passing through a cloud. Now there are many clouds out there, and as consequence, along the plane of the galaxy, there are many regions that we cannot see in visible light, though infra-red can often penetrate. There just isn't one nearby, as far as I know.

    By the way, welcome to the forum.


    Reply With Quote  
     

  4. #3  
    Suspended
    Join Date
    Apr 2007
    Location
    Pennsylvania
    Posts
    8,795
    He is probably referring to this. We do seem to be in a cloud at the present time. I'd say the reason it doesn't obscure our vision is because it is not really very dense.
    Local Interstellar Cloud - Wikipedia, the free encyclopedia
    G-Cloud - Wikipedia, the free encyclopedia
    Reply With Quote  
     

  5. #4  
    Universal Mind John Galt's Avatar
    Join Date
    Jul 2005
    Posts
    14,168
    I was afraid of that. I do not know how I could possibly have missed this.
    Reply With Quote  
     

  6. #5  
    New Member
    Join Date
    Mar 2013
    Posts
    3
    hi,
    thanks for the welcome.
    Reply With Quote  
     

  7. #6  
    New Member
    Join Date
    Mar 2013
    Posts
    3
    well if we were to pass through a dense cloud like maybe the Orion nebula, if you will, would that obscure our vision? also if the cloud is not very dense, wouldn't it still make space fuzzy meaning like how fog works, low density fog still obscures our vision to an extent, e.g if you looked toward land on a hill, you wouldn't be able to see as far away.
    Reply With Quote  
     

  8. #7  
    Suspended
    Join Date
    Nov 2012
    Location
    Apocalyptic Paradise
    Posts
    6,613
    Quote Originally Posted by venomkiler View Post
    well if we were to pass through a dense cloud like maybe the Orion nebula, if you will, would that obscure our vision? also if the cloud is not very dense, wouldn't it still make space fuzzy meaning like how fog works, low density fog still obscures our vision to an extent, e.g if you looked toward land on a hill, you wouldn't be able to see as far away.
    Yes, but not to the extent of fog. Bear in mind the distances- the spacing- involved, here. Unlike fog, which is, by comparison, extremely dense (especially in relation to size and distance from the eye) the interstellar clouds have several magnitudes greater distance between the matter that comprises it.
    It's a bit like asking why we can see a tree 100 yards away when all this air is in the way. It's nowhere near dense enough to inhibit our view.
    So, technically, yes it will obscure our view ever so slightly. But not in any way like you're asking.
    Reply With Quote  
     

Similar Threads

  1. Replies: 7
    Last Post: July 29th, 2012, 11:37 AM
  2. Interstellar ship
    By Hunter-azor in forum General Discussion
    Replies: 25
    Last Post: November 11th, 2011, 05:24 PM
  3. Book research: Faster Than Light/ Interstellar travel
    By Novelist2639 in forum Astronomy & Cosmology
    Replies: 15
    Last Post: August 18th, 2011, 06:22 AM
  4. Interstellar Medium
    By Cold Fusion in forum Astronomy & Cosmology
    Replies: 12
    Last Post: July 4th, 2008, 10:32 AM
  5. Local/picturelike life, Local/picturelike time
    By LeavingQuietly in forum Philosophy
    Replies: 2
    Last Post: September 2nd, 2007, 03:34 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •