• Question: What is a blach Hole?

    Asked by mharrak on 2 Mar 2020.
    • Photo: Ioana Grigoras

      Ioana Grigoras answered on 2 Mar 2020:


      Hi! As far as I know, a black hole is place in the universe where the density of the matter is so high that not even light can escape it. That is why it’s called ‘black’, because all the light is absorbed and it would be perceived as black. That being said, I don’t study anything astronomy related and have no idea how to explain this in more detail. The thing about research is that you learn very much about whatever it is you are interested in, but end up not knowing a lot about everything else ๐Ÿ˜€

    • Photo: Aleksandr Sahakyan

      Aleksandr Sahakyan answered on 3 Mar 2020: last edited 3 Mar 2020 1:07 am


      To add to Ioana’s excellent response, sometimes stars can become so massive that, at the end of their life cycle, they can collapse because of their own gravitational force, and form a black hole. The latter can then continue to grow by absorbing more matter from surroundings. This is a great period to be curious about black holes, as just last year, scientists were able to get a picture of a black hole (and what happens at its peripheries) for the first time. You can easily find that picture by googling “black hole” (the first one in the image results).

    • Photo: Mahrukh Shameem

      Mahrukh Shameem answered on 3 Mar 2020:


      I think the 2 answers so far explain it well!

      I always think of a it the death of a star! Very dramatic I know but I would also suggests searching a few images of it. Its this dark vast void and just recently some extremely talented scientists were able to take a photo of it!

    • Photo: Katrina Wesencraft

      Katrina Wesencraft answered on 3 Mar 2020:


      I asked some of the physicists I work with and they told me two really cool things:

      – scientists think that black holes are spheres that spin around
      – if they do spin, their gravity is so strong that space and time would be pulled weirdly around them

      So if you could ever get close to a black hole, you could be travelling through space or time or both!

    • Photo: Chun Hei Kwok

      Chun Hei Kwok answered on 4 Mar 2020:


      That’s a tricky question. My understanding of a black hole is that it has a very strong gravitational force that allows it pull lots of things into it. I’m not sure why can it exert such great force, but perhaps that is something that researchers in the astrophysics field are looking into. There are lots of space movies that talk about black holes, but make sure you don’t take them as the facts because movies are movies!

    • Photo: Nathan Kindred

      Nathan Kindred answered on 5 Mar 2020:


      The other answers sum it up pretty well! I think it’s basically part of space with a strong gravitational pull, which is thought to be caused by a bend in spacetime!

    • Photo: Sophie Arthur

      Sophie Arthur answered on 5 Mar 2020:


      I don’t think I can summarise what a black hole is more than the others here. My friend Emma makes YouTube videos about physics and here is one about black holes if you need anymore info

    • Photo: Samir Hopestone

      Samir Hopestone answered on 6 Mar 2020:


      A place in the universe which is so dense that not even light can escape it.

    • Photo: Kate Mitchell

      Kate Mitchell answered on 8 Mar 2020:


      I’m not a physicist and its a long time since I studied physics, so I had to look this one up – according to NASA its “a place in space where gravity pulls so much that even light can not get out”

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