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Black Holes

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  • Black Holes

    I watched a program about black holes last night. It was very interesting.

    Three things particularly struck me.

    1. They are predicted by Einstein’s Theory of Relativity, though Einstein himself believed they would not exist in the real world and thought he had proved it. It now turns out they are very common. There is black hole at the centre of each galaxy and thousands of ‘stellar black holes’ in each galaxy.

    2. At the centre of each black hole is a singularity with infinite mass and gravity and zero, or approaching zero, size. A problem is that at this point the theory of relativity does not apply. However Quantum Mechanics does deal with tiny (subatomic) space so they have tried to fuse the two theories (a ‘theory of everything’) but that only leads to equations with more infinities in them.

    3. There is an idea now that the ‘big bang’ sprang out of such a singularity, though they can’t explain how such a singularity came to exist in the first place!


  • #2
    They can't explain were the Big Bang singularity came from, in the first place. They can't explain how it expanded, in the second place. They can't explain why half the universe isn't anti-matter (when the universe cooled enough for energy to convert to matter, equal amounts of anti-matter would have been created). If the "cosmic background radiation" is from the Big Bang, they can't explain why it's so smooth. They have some wild hypotheses to try to explain what they can't explain, but these solutions create more problems than they fix. There's too much about the Big Bang that can't be explained for me to believe it.
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    • #3
      Very true, but they are convinced that one day they will. :)

      A couple more interesting points from the program.

      Firstly, It's difficult to see the centre of our galaxy because of the dust in between us and it. But they designed a special telescope to see through the dust and saw some bright objects (stars) in orbit around the centre. From the mass of the objects and the track of the orbits they could estimate the mass of the black hole they were orbiting around. The black hole was some million times the mass of our sun. They estimate some black holes are billions of times the mass of our sun.

      Secondly, in theory there should be a rim of light around a black hole (like a halo) casused by the light from the far distance behind the black hole being bent by it's gravity. To see that, one scrientist estimated they would need a telescope the size of the American continent. Obviously impossible. But he was working on a project which took data from all the telescopes in the world that he could get to send him data and then process it all to be the equivalent of one giant telescope. The amount of data was collossal and the processing time for his supercomputer takes months for one data set. The results could take years to process.

      It's all fascinating stuff.

      Isn't God amazing!!!

      He can create all this and yet look after each one of us, even to counting the hairs on our heads.
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      • #4
        There is a new theory called Quantum Fluctuation that some scientists think may replace the Big Bang theory. The Answers in Genesis website has an interesting article on the subject called "Quantum Fluctuations May Kill Big Bang Evangelism."

        Quantum Fluctuations May Kill Big Bang Evangelism | Answers in Genesis
        Last edited by theophilus; 05-12-2015, 08:01 AM.
        Clyde Herrin's Blog
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        • #5
          Radio telescopes are designed to "see" through dust clouds, etc. which optical telescopes cannot see through. We live near the largest radio telescope in the world that can rotate, run by the National Radio Astronomy Observatory (NRAO). The antenna is so sensitive and immense, one cannot wear even an electric wristwatch within certain areas of the facility without fouling up the data. Cell phones are eliminated except for one low-powered AT&T tower. It is a dead zone. It is internationally acclaimed, as I met a professor from Denmark on my way in as he was on his way out, right off the bat. The only other radio telescope comparable to it is in Australia.

          They send signals in specific patterns looking for reflections, calculating the distance and frequency changes of reflections. They also do passive listening, but not for the purposes of SETI. That is a totally separate organization with the purpose of finding life "out there". The vehicles which operate near the antennae are propane-powered and heavily shielded to avoid interference. Quite a fascinating place.
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          • #6
            Science can try to explain the creation of the universe but the best scientists will do is posit theories . . . what they think might happened. But all the answers I need are in the bible. There comes a time when one must make a choice: do you trust God or humans?
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