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Sunday, 7 October 2012

Black Hole

A black hole is an object in space whose gravity is so great that nothing can escape from it, not even light. . Black holes can be detected because gas falling towards them becomes so hot that it emits X-rays.

The term black hole for a collapsed star was opposed by the French, as its literal translation into French is a rude term.

At the centre of our Galaxy lies an object that has a mass four million times that of the Sun and is almost certainly a black hole.

Black holes don't suck up everything nearby—they sit dormant and if a star approaches it and gets too close, the black hole becomes active.

No matter how long you watch an object slip into a black hole, you will never actually see the object enter it due to time dilation.

If you were near a black hole and facing away from it, you could actually see the back of your own head due to the light bending.

A black hole the size of a hydrogen atom would exert a pull from 2,000 feet away.

A black hole emits a deep b flat sound.

Over billions of years, black holes become white holes and they spit out all of the things they sucked in. the atoms are completely jumbled, so no one knows what will ever come out. 

The black hole inside RX J1131 was the first black hole to have its spin directly measured.

The supermassive black hole in the center of our galaxy has four million times the mass of the Sun.

The largest known black hole is in the Holmberg 15A supergiant elliptical galaxy It has a diameter of 1 trillion kilometers, more than 190 times the distance from the Sun to Pluto.

The supermassive black hole at the center of the quasar OJ287 has been measured as weighing 18 billion times the mass of the Sun, six times heavier than the previous record holder.

In the 2014 science fiction film Interstellar the depiction of a black hole required completely new CGI rendering software and was so accurate that it provided enough insight to publish three scientific papers.

Source Hutchinson Encyclopedia © RM 2012. Helicon Publishing is division of RM

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