Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The Ball is There!

  1. Jun 22, 2007 #1
    You know how all those science channel specials on black holes, they depict a black hole as a funnel in space that sucks everything into another universe.

    Wouldn't super dense matter do the same thing? not let anything escape, even light? Wouldnt that be a better explanation?
  2. jcsd
  3. Jun 22, 2007 #2


    User Avatar

    Staff: Mentor

    A black hole is super-dense matter.
  4. Jun 22, 2007 #3


    User Avatar
    Gold Member

    "Real" science shows - ones that aren't sensationalizing - will not make unfounded speculations about matter getting sucked into other universes.

    Black holes are not "holes" at all, they are simply matter that has collapsed in on itself. The matter is still there, just in a form we don't understand.

    Note that if you add mass to a black hole, its gravitational field grows - direct evidence that the matter is still there.
  5. Jun 22, 2007 #4
    They should be renamed Black Balls then, right? Let's start a trend.

  6. Jun 22, 2007 #5
    I can only imagine trying to teach a class full of kids about "massive black balls" "balls so massive, not even light can escape!" ... I think museum workers and science teachers have enough trouble with "Homo Erectus" as it is.

    ... and I bet they'd be glad the universe isn't blue :rofl:

    the picture of the funnel is just an analogy of the gravity. To demonstrate how strong it gets as it gets nearer and nearer whatever the heck is in the center. so it's not just out of the blue.
    Last edited: Jun 22, 2007
  7. Jun 22, 2007 #6

    :rofl: That is TOO FUNNY!
  8. Jun 22, 2007 #7
    Incidentally, they have just been renamed as http://www.dailyredundancy.com/archives/1018.html [Broken].

    (via Bad Astronomy)
    Last edited by a moderator: May 2, 2017
  9. Jun 22, 2007 #8
    Well its nice to know I'm on the right track. Total layman here.
  10. Jun 22, 2007 #9


    User Avatar
    Science Advisor

    According to Einstein's theory of general relativity, once the matter has collapsed to a sufficiently small size, it will inevitably collapse further into a single point with zero size and infinite density--a "singularity". Physicists think that at sufficiently small scales quantum effects may cause general relativity's predictions to become significantly incorrect, but the scale where it's expected to break down is extremely tiny, so even if the matter does not collapse to a mathematical point it is probably compressed down to something on the scale of the Planck density, which for a black hole formed from a star would be much smaller than a single proton.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: The Ball is There!
  1. Two balls in space (Replies: 27)