here listen to this :)
http://www.jb.man.ac.uk/~pulsar/Educ...ds/sounds.html
then
http://www.youtube.com/watch?v=VfN-WmlrYjs
the read this :)
Neutron stars are remnants of exploded stars (see: Iron). As more matter falls into a neutron star its mass increases; and as its mass increases its gravity increases. A point will be reached where gravity would have grown so much that not even light could escape, thus a black hole forms.
Most neutron stars discovered today are in the form of radio pulsars. They are called radio pulsars because they emit radio waves. We can simply connect a radio telescope to a loud speaker and hear a pulsar. Pulsars sound like someone persistently knocking. Click here and listen to a slow knocking pulsar. Click here and listen to a fast knocking pulsar.
So in short, we can hear a pulsar knock; and if matter continues to fall into this pulsar a black hole will eventually form. Moslems say that this is what Allah says. The Quran describes a star by "The one who knocks" and says that it is "The one who makes a hole".
[Quran 86.1-3] And the heaven and the "Knocker" (Tarek in Arabic) 2 How could you know about the "Knocker"? 3 The piercing star (Thakeb in Arabic).
The Arabic word "Thukb" means a hole; "Thakeb" means the one who makes the hole. The Quran is describing a knocking star that makes a hole.
At the center of black holes (collapsed stars) lies a location called the Singularity. An observer far away from a black hole sees the events near a back hole in slow motion. If he shines a beam of light into this black hole he will have to wait forever but still this beam of light will never reach the singularity. The singularity is a location where gravity has gone so mad that space and time become indistinguishable. From general relativity we know that this is a location where the structure of spacetime becomes singular (hence the name singularity). However singular (Ahad in Arabic) is one of God's 99 names. In the Quran God swears by the locations of stars which turned out to be His own name:
[Quran 56.75-77] I swear by the locations of stars, 76 it is a great swear if you knew, 77 it is a noble Quran...
Here God swears not by the stars themselves but rather by their locations (mawakeh in Arabic). Today we know that these locations are singular, that is, they carry God's own name: "Ahad".
Moslems ask how could an illiterate man who lived 1400 years ago have figured out Pulsars, Black Holes and Singularity?
[Quran 26.2-6] These are the verses of a clarifying Book. 3 You might be frustrated that they don't believe; 4 If We wish, We hand down from the heaven a sign (proof); their necks to it remain subdued. 5 And every new revelation they were given from The Most Gracious (Allah) they dismissed. 6 They disbelieved (the Quran), so they will receive the news of what they have been mocking.
http://www.speed-light.info/pulsars_black_holes.htm
and here is some more to read
SUBHAN ALLAH
http://en.wikipedia.org/wiki/Pulsar
ALLAHU AKBAR
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