• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3

# Black holes

Extracts from this document...

Introduction

BLACK HOLES Black holes have many a mystery surrounding them. Lots of non-scientists do not even know what they are or what they do. Children believe (due to many science fiction stories) that Black Holes transport you to a different dimension. Hypothetically this idea could very well happen according to the strange nature of Einstein's equations but seems very unlikely. What is a Black Hole? Black holes were once thought to be the monsters of the Universe but are now thought to be fundamental to the creation of a galaxy. A black hole is a region of time in space from which nothing including light can escape making them impossible to see. However we know they are there because we can see the stuff near them getting sucked in because they are like a giant vacuum. Figure. 1 Figure. 1 shows the event horizon of a black hole. This is formed by rays of light that can't quite get away from the black hole but are always floating around the edge of them. ...read more.

Middle

They are perfectly spherical which only depend on their mass to determine what size they are, and only black holes with the same mass are identical. A New Zealander called Roy Kerr (photo on right) was the man to discover how to describe a rotating black hole. These black holes rotate at a normal speed only their mass and velocity of rotation determine their size and shape. There are different descriptions of rotations. If the rotation is zero, the black hole is perfectly round and identical to a non-rotating black hole. If the rotation is one, the black hole bulges and the faster it rotates the more it bulges. Finally, if the rotation is two the black hole looks the same if it makes half of a full rotation. Scientists have figured out that black holes eventually settle down and stop rotating. An electrically charged black hole has two event horizons thus has two places where time appears to stop. The inner event horizon starts to get larger as more and more electric charge is thrown into the black hole. ...read more.

Conclusion

When a black hole was part of this system, it would pull gaseous material off the surface of a neighbouring star and the gaseous material would spiral into the black hole. This is called an accretion disk. White holes A white hole is an additional singularity of a Schwarchild black hole. A white hole is thought to show opposite features to a black hole. It supposedly repels matter whereas a black hole sucks in matter with a huge attractive force of gravity. There is a theory about white holes although never observed. They are said to be a missing link between our universe and another, releasing matter that for us is lost into the black hole. Conclusion Although there are still many mysteries surrounding black holes, we assume them to exist from our findings of what happens to the matter. Also, as many people also think that there is only one kind of black holes we have also shown through our findings that there are many different kinds of them and they will continue to make a mark on our universe. Universe and Everything Essay Garry Neilson Student No. 200110147 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our University Degree Astronomy 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

# Related University Degree Astronomy essays

1. ## Exploring the Variable Luminosity of Star Systems.

If two stars are extremely close, when observing the binary star system, it is often observed as a single light source and can be mistakenly taken as a single star. If these stars could not be observed our estimates for the number of stars, in our Universe, would be inaccurate, by a large factor.

2. ## Black Holes

But how on Earth was such space created in the first place? The formation of a black hole can be explained by the death of a star at the current level of astronomical knowledge and theories, which will be explained later on.

1. ## Black Holes.

These black holes could be tiny, similar to the black hole featured in a short story; 'The Hole Man' by Larry Niven, which was tiny. As we have had large black holes and the possibility of tiny black holes it would only be fair to mention the creation huge black holes.

2. ## The aim of this project is to investigate current theories and experimental data which ...

The main area that research can help enormously is in the measuring of speed and distant of galaxies far away, and comparing them to nearby which should be faster as the cosmological constant has had more time to act. The ultimate fate of the universe in this scenario is a

1. ## I am writing about a scientific book called 'The Guide To The Galaxy' by ...

One of the other galaxies that excites interest and like Andromeda can be seen to the naked eye is the small spiral galaxy M33. The chapter begins the tour with the largest, Andromeda and talks about its discovery, when it was first viewed, photographed and the arrangement of its stars revealed.

2. ## Black Holes - Do they exist and if so what effect could they have ...

Then in the early 1900's Albert Einstein united the concepts of space and time; first discovered by Isaac Newton, with ideas of light itself. The result was that Einstein realised that space and time had to be dynamic entities that were themselves responsible for the force of gravity and this lead to his general theory of relativity.

1. ## What is a Black Hole?

The Sun, for example, has a radius of about 700,000 kilometres, and so that super massive black hole has a radius only about four times bigger than the Sun. If The Earth were a black hole then it would be only about 9m radius roughly the size of my bedroom :)

2. ## What is a black hole? What is the evidence that black holes actually exist, ...

Short gamma ray bursts are produced from what is left over from when the supernovas merge, that is excessive dense stellar cores. These rays create massive amounts of energy, such that it is detectable across the entire observable universe, making it easier to find and identify as well as explain the formation of black holes.

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