• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The term black hole was first used in 1969 by the American scientist John Wheeler.

Extracts from this document...

Introduction

The term black hole was first used in 1969 by the American scientist John Wheeler to describe an object that had such a huge gravitational pull that not even light could escape it, thereby rendering it invisible or black. John Michell extended upon this idea in a paper called the “Philosophical Transactions of the Royal Society of London” in which he pointed out that a star that was sufficiently massive and compact would have such a strong gravitational pull that not even light could escape it as any light emitted by the star would be pulled back in by gravity – this was the first theory of a black hole. It is known today that black holes are in fact the fate of huge stars. When these huge stars collapse they eventually collapse to a point where they are infinitely dense yet infinitely small – a black hole.

Inside a star, hydrogen atoms are constantly being fused to make helium atoms. This process is known as nuclear

...read more.

Middle

The second possibility occurs if the star is very large. The star will throw out its outer layers in a terrific explosion, this is called a supernova. The star will then begin to contract under the force of gravity. But unlike the first possibility, this star will not be able to halt its collapse. The star will become smaller and smaller until it gets to the point where it has become infinitely dense and infinitely small – the singularity of a black hole.

A black hole consists of two main parts, a singularity and an event horizon. The event horizon is like the “skin” of a black hole, once you pass the event horizon there is no escape. The horizon is often referred to as the clothes of the black hole, as it is a barrier that separates the singularity from the rest of the universe. The event horizon can be seen by rays of light that are caught in a perpetual orbit around the black hole – unable to escape yet unable to fall in.

...read more.

Conclusion

First, as you neared the even horizon, time would appear to take longer and longer and as you entered the even horizon your image would remain there for an eternity. This is because at that very moment, the light that you are emitting would be caught in the event horizon. It would appear to an observer that you were frozen in time, staying in the same position forever. But in fact it is just the light, not you that is stuck. As you entered the black hole time would go faster and faster, and if you looked up you would be able to see the entire universe evolving in front of you. But this amazing sight comes at a great cost, as you begin to near the singularity you would feel your body begin to stretch. Eventually your body would be stretched so far by the colossal gravity that you would be ripped apart!

...read more.

This student written piece of work is one of many that can be found in our GCSE The Earth and Beyond section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE The Earth and Beyond essays

  1. Peer reviewed

    Black Hole

    3 star(s)

    The detailed properties of black holes are studied by using Einstein's general theory of relativity and gravitation. In 1917 a German astrophysicist, Karl Schwarzchild, used Einstein's theory to calculate that if a star of any given mass were compressed to a size smaller than a critical radius, now called the

  2. Should We Persue Manned Space Flights?

    Several soldiers who were in the trench were killed. Oct 24 1960 Baikonur, Kazakhstan 126 Explosion of R-16 ICBM on launch pad. April 14 1964 Cape Canaveral, USA 3 Rocket ignited in assembly room. May 7 1964 Braunlage, Germany 3 Mail rocket built by Gerhard Zucker exploded and debris hit crowd of spectators.

  1. When one begins to study satellites he or she is bound to find out ...

    They are very important to the world of communication, but it takes a great deal of work to get them in and out of orbit. Launching is essential to satellites , but many problems might be encountered during the launching or retrieving of a satellite, which might cause for repairs to be made in space.

  2. Astronomy is my first love.

    I don't know why but I was not something you can call 'intelligent'. But as soon as Astronomy came in my life, everything changed and I mean it, everything! My whole way of thinking, my interests, my ideas. All other interests of mine have their roots in Astronomy.

  1. In the beginning God created the Heavens and the Earth.

    The sun was evidently present before, it is the only source of illumination in this solar system, now it was revealed on the earth, together with the moon, and they were set not only to mark the passage of time between day and night, but also to be for signs.

  2. North American Indian story - the mud on the turtles back.

    One night she dreamed about a tree covered with white blossoms, a tree that brightened up the sky when its flowers opened but that brought terrible darkness when they closed again. The dream frightened her, so she went and told it to the wise old men who lived with her in their village in the sky.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work