Black Holes

Black Holes

Length: 1016 words (2.9 double-spaced pages)

Rating: Excellent

Open Document

Essay Preview

More ↓



In 1916, the German astronomer Karl Schwarzchild attempted to theorize how a star could shrink to become what he called a "Black Hole". Schwarzchild predicted that our sun would have to shrink to less than two miles in radius. He also predicted that even though the sun had shrunk its mass and weight would remain the same, which means that the planets would continue on their orbits, uneffected. Schwarzchild still questioned if stars could become this compact.
In 1934 W. Baade and F. Zwicky predicted that the collapse of a star, strips the atoms of their electrons, thus making it a Neutron Star. He also predicted that these are only 10-15 miles in diameter with a density of about a billion tons per cubic inch.
The American physicists R. Oppenheimer and H. Snyder, in 1939, realized that Schwarzchild theory was only possible if the star was much bigger than our sun; approximately 3.9 times or larger.
In the early seventies, a x-ray source was located in the Constellation Cygnus. The x-ray source couldn't actually be precisely located but was narrowed down to a relatively small area. At this time it was very puzzling for the scientist.
Steven Hawking, in the seventies, came up with theoretical arguments demonstrating that black holes aren't entirely black and that it is possible for them to evaporate because they emit radiation. The radiation from a black hole comes from the mass of it, hence the black hole insinuatingly shrinks. While the radiation tediously increases, the mass slowly decreases. So as the radiation from the black hole increases the black hole shrinks and evidently vanishes.
In 1972, scientist pinpointed a radio emission in the same area. This is still puzzling to scientist today but all they knew was that it was originated from the same area as the x-ray source and apparently came from open space. The scientist watched this area for months and finally waited until the spot in space came over the star next to it. When it did there was startling results. The spot in space eclipsed the star next to it. The spot was then named Cygnus X-1 and was officially the first Black hole discovered.
Even back in Isaac Newton's time, scientist speculated such an object existed. So many questions had been answered by the discovery of this mysterious object, yet so many more generated.
A Black Hole is an object that is so dense not even light can escape its gravity.

How to Cite this Page

MLA Citation:
"Black Holes." 123HelpMe.com. 12 Nov 2019
    <https://www.123helpme.com/view.asp?id=153279>.

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Physics of Black Holes Essay

- Black holes - the strange scientific phenomenon that has astounded physicists and astronomers alike for decades. Popular subjects in science fiction novels, black holes are one of the greatest enigmas of the scientific world. Even today, the concept of a super-dense ball of matter that not even light can escape from is somewhat farfetched, and many scientists disagree with each other about nearly every aspect of a black hole. This project will attempt to shed some light on these mysterious formations, and will inform you the reader of the most popular and widely accepted theories surrounding them....   [tags: physics space black holes]

Research Papers
841 words (2.4 pages)

Black Holes Essay

- Introduction Black holes are one of the more interesting topics in astrophysics. Even though they are commonly accepted as being real, their actual existence has yet to have been proven2. Black holes are objects that have such a concentration of mass that nothing can escape their gravitational pull once it crosses the black hole's event horizon or Schwarzschild radius. The Schwarzschild radius is the radius where, for anything inside, the escape velocity is greater than the speed of light....   [tags: space black hole]

Free Essays
531 words (1.5 pages)

Black Holes Essay

- When a star "dies" it can do many different things. It can form a neutron star, expand to a red giant and shrink into a white dwarf, or sometimes collapse upon itself to form a black hole. This is mostly dependent on the density of the star. When massive stars, those twenty times the mass of our Sun or more die, they must either exhaust all of their excess mass or implode upon themselves and form black holes. Gravity overwhelms even the nuclear forces. The gravitational force becomes so strong that nothing can escape it, even photons of light, hence the name "black" hole....   [tags: physics science black hole]

Research Papers
717 words (2 pages)

Black Holes Essay

- Stars, comets, planets, they are all visible when you look up past our atmosphere. What if I told you that there were objects up there that you could not see, but had more gravity than an object 500 time larger than our sun. Objects, that are capable of swallowing whole planets within a split second of time. An object that would steal light right out of thin-air. These objects are more powerful than anything man made. Black holes are the most popular unknown object in science. A black hole is an area of space that has so much mass crammed in it that there is no way for an object to escape its gravitational pull....   [tags: Black Hole Essays]

Free Essays
467 words (1.3 pages)

Black Holes Essay

- The theory that black holes have existed is not new at all. The thought of them first started in 1783 when Rev. John Michell applied Newton’s theory of gravity to predict the possibility of so-called “dark stars.” Albert Einstein’s theory of relativity predicted in 1915 “Schwartzschild singularities.” In 1967, these were renamed “black holes.” A black hole is collapsed object (usually a star) that has become invisible and has such a powerful gravitational force that nothing, even light, can escape its surface....   [tags: essays research papers]

Free Essays
1073 words (3.1 pages)

Black Holes Essay

- In 1916, the German astronomer Karl Schwarzchild attempted to theorize how a star could shrink to become what he called a "Black Hole". Schwarzchild predicted that our sun would have to shrink to less than two miles in radius. He also predicted that even though the sun had shrunk its mass and weight would remain the same, which means that the planets would continue on their orbits, uneffected. Schwarzchild still questioned if stars could become this compact. In 1934 W. Baade and F. Zwicky predicted that the collapse of a star, strips the atoms of their electrons, thus making it a Neutron Star....   [tags: science physics space]

Free Essays
1016 words (2.9 pages)

Essay on Black Holes

- Black Holes      Every day we look into the night sky, wondering and dreaming what lies beyond our galaxy. Within our galaxy alone, there are millions upon millions of stars. This may be why it interests us to learn about all that we cannot see. Humans have known the existence of stars since they have had eyes, and see them as white glowing specks in the sky. The mystery lies beyond the white glowing specks we see but, in the things we cannot see in the night sky such as black holes.      Before I begin to speak about black holes, I will have to explain what the white glowing specks in the sky are....   [tags: Space Astronomy Essays Papers]

Research Papers
1549 words (4.4 pages)

Black Holes Essay

- If theories of their existence are true, black holes are the most powerful force in the known physical universe. Many people are familiar with the term black hole, but few people actually know anything about them. A black hole forms as a result of a massive star running out of fuel to burn (Chaisson, 193). Once the star is no longer exerting outward force by burning off gases, it begins to collapse under it’s own intense, inward gravity (Chaisson, 193). It is like slowly letting the air out of a balloon....   [tags: essays research papers fc]

Research Papers
1456 words (4.2 pages)

Essay on Black Holes

- Black Holes Within our galaxy alone, there are millions upon millions of stars. Within our universe, there are millions upon millions of galaxies. Humans have known the existance of stars since they have had eyes. Although interpretations may have differed on what they were, they were always thought of as white glowing specks in the sky, but the mystery does not lie within what we can see, but what we can not see. There are billions of stars lighting the darkness of our universe, but the question lies in what happens when one of these enormous lamps burns out....   [tags: essays research papers]

Research Papers
1038 words (3 pages)

Black Holes Essay

- Black Holes Black holes are objects so dense that not even light can escape their gravity, and since nothing can travel faster than light, nothing can escape from inside a black hole. Loosely speaking, a black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull. Since our best theory of gravity at the moment is Einstein's general theory of relativity, we have to delve into some results of this theory to understand black holes in detail, by thinking about gravity under fairly simple circumstances....   [tags: essays research papers]

Research Papers
3671 words (10.5 pages)

Sense nothing is faster than light, nothing can escape. A Black Hole is the evolutionary endpoint for massive stars at least 10-15 times bigger than our sun. If a star that big undergoes a supernova explosion, it may leave behind a burned-out, massive, super-dense remnant.
With no fuel to have the outward force the remaining star might collapse on its own gravitational force. The star eventually reduces to point zero volume and infinite density, creating a singularity. As the density reaches infinite, photons bend around the singularity and light emitted by the star is bent and is kept within a certain point called the event horizon by the intense gravitational field. Nothing will ever leave the event horizon of a black hole and because no light will ever leave the event horizon, it is referred to as a Black hole.
Contrary to popular belief, a Black hole isn't a cosmic vacuum that consumes everything. For example, if our sun were to become a Black hole the only thing that would change on Earth would be the temperature. The Earth would not be "sucked in". Only matter that entered the event horizon would be "sucked in".
Material that does enter the event horizon is pulled into a spiral. For example if there is a binary stars and one of them turns to a black hole and starts to feed off the brother star, the gas would be pulled into a spiral called the accretion disk. As material gets closer to the Black hole, it heats up and emits X-rays. The closer the material gets to the Black hole the more X-rays it produces.
According to Einstein, a Black hole is where time and space is warped and are different from the outside of the event horizon. So if a observer were watching a person fall into a Black hole from a safe distance, they would see the person fall normally until they entered the event horizon. Then the person would slow down and if the observer could stay alive for a few billion years they would see the person disappear into the singularity at the same moment the Black hole evaporates.
Even today, information about Black holes continue to amaze scientist. Images from the Chandra X-ray Observatory have capture, for the first time, two super-massive black holes circling each other. The black holes will whirl around each other for approximately 100 million years, until they merge.
The two black holes are about the same size as the one in the center of our galaxy and is about the mass of 100 million of our suns. The black holes supposedly are the remains of two separate galaxies that merged 100 million years ago to make the NGC6240 Galaxy. When the galaxies blended they left one extremely bright galaxy with two black holes circling each other on a collision course.
Scientist believe that in about four billion years, the billions of stars in the Milky Way and the Andromeda Galaxies will merge and a similar situation will happen with the two super-massive black holes of our galaxies.
Astronomers say that the two black holes of the NGC6240 galaxy are about 3,000 light-years apart and are traveling at about 22,000 mph. As the black holes grow closer and closer their speed will increase and nearly reach the speed of light before merging, about 671 million mph.
When the black holes merge, their momentum will be converted to gravitational waves and the black holes will spew radiation throughout the universe. Since momentum can't be stopped, the gravitational waves will travel infinite distances thus shifting the gravitational constant throughout the universe.

Return to 123HelpMe.com