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Black holes and stars

  1. Jun 15, 2013 #1

    One can register waves of light.
    Is there anything known different then stars where we receive information from?
    Say black holes?

    I really guess.
  2. jcsd
  3. Jun 15, 2013 #2
    Hi bhpv,
    I think I can help you, but I really don't understand the question. Can you rephrase it? And be more specific?
  4. Jun 15, 2013 #3


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    Gold Member
    2016 Award

    Yes, I agree w/ Dennis --- your question is incoherent
  5. Jun 15, 2013 #4
    Ok. Sorry for that.
    I do not understand what one can experience from black holes here on earth.
  6. Jun 15, 2013 #5
    Black holes are not directly detectable. We detect them by their effects on surrounding matter. For example, if you see a star orbiting around something, but you can't see the thing it is orbiting, then the thing is probably a black hole.
  7. Jun 15, 2013 #6
    First, I'd like to explain that I didn't understand that question because there are different answers to it but the general answer to that question is : yes!

    This question I understand :smile:. Black holes are very hard to detect, but there are good reasons for believing that they exist; as an example, astronomers have seen stars orbiting what appears as a very large "dark" mass centre in the centre of the Milky Way.

    I sincerely recommend this clip:
    ESOcast 2: Unprecedented 16-year long study tracks stars orbiting Milky Way black hole
  8. Jun 16, 2013 #7


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    Staff: Mentor

    Try a google search on "gravitational lensing black hole".
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