This website uses cookies to ensure you have the best experience. Learn more

Formation Of Black Holes Essay

711 words - 3 pages

The concept of a body so massive that not even light could escape it was put forward by the English geologist John Michell in a 1783 paper sent to the Royal Society. At that time, the Newtonian theory of gravity and the concept of escape velocity were well known. Michell computed that a body 500 times the radius of the Sun and of the same density would have, at its surface, an escape velocity equal to the speed of light, and therefore would be invisible. In his words:If the semi-diameter of a sphere of the same density as the Sun were to exceed that of the Sun in the proportion of 500 to 1, a body falling from an infinite height towards it would have acquired at its surface greater velocity than that of light, and consequently supposing light to be attracted by the same force in proportion to its vis inertiae (inertial mass), with other bodies, all light emitted from such a body would be made to return towards it by its own proper gravity.Although he thought it unlikely, Michell considered the possibility that many such objects that cannot be seen might be present in the cosmos.In 1796, the French mathematician Pierre-Simon Laplace promoted the same idea in the first and second edition of his book Exposition du Systeme du Monde. It disappeared in later editions. The whole idea gained little attention in the 19th century, since light was thought to be a massless wave, not influenced by gravity.In 1915, Einstein developed the theory of gravity called General Relativity. Earlier he had shown that gravity does influence light. A few months later, Karl Schwarzschild gave the solution for the gravitational field of a point mass, showing that something we now call a black hole could theoretically exist. The Schwarzschild radius is now known to be the radius of the event horizon of a non-rotating black hole, but this was not well understood at that time. Schwarzschild himself thought it not to be physical.In the 1920s, Subrahmanyan Chandrasekhar argued that special relativity demonstrated that a non-radiating body above 1.44 solar masses, now known as the Chandrasekhar limit, would collapse since there was nothing known at...

Find Another Essay On Formation of Black Holes

Black Holes: What Scientist Know About Them

2213 words - 9 pages before astrophysical black holes can be confirmed to exist in the physical world. Supermassive black holes are black holes that have consumed an entire galaxy. These black holes are classified as regular black holes with the mass of millions to billions of solar masses. Supermassive black holes are estimated to be in the center of every galaxy; there is one in the middle of our own Milky Way. It is also theorized that star formation is caused by

BLACK HOLE Essay

1742 words - 7 pages galaxy, Andromeda, lies a supermassive black hole as well. The stars that orbit around it were measured by its average speed. When this was done, it showed that Andromeda’s black hole has a mass of thirty million times more than the sun. Supermassive black holes are not the only type of black hole that can be measured with this method. III. A Black Hole’s Formation A black hole is formed by a supernovae. The last stage of a star is

The Mystery Behind Black Holes

1368 words - 6 pages incredibly strong, dragging in space junk and even light, causing it to be invisible to our eyes. A black holes formation can be incredibly violent and dangerous, but is almost unfathomable. One of the most intriguing mysteries of black holes are time dilation and theory of relativity, In the theory of relativity, time dilation is a difference of elapsed time between two events as measured by observers either moving relative to each other or

The Magnificent Life of the Black Hole

1343 words - 6 pages The magnificent life of a black hole. The black hole is a mystery that you will want to learn about. A black hole does many wonderful things in outer space. Black holes in outer space have been a mystery for years. There are many questions such as how is a black hole born and how does a black hole grow. What is a black hole? A black hole is a dead star in outer space. It is where planets and stars disappear at. The gravity of a black hole is

Black Holes: What They Are and Do

2417 words - 10 pages inwards force of gravity and the protostar stops contracting. It is now a main sequence star, or a normal star such as our sun (LTQ). Nuclear fusion plays an important role in the formation of black holes. As explained before, nuclear fusion is the process by which through high pressure and temperature, small elements such as hydrogen are combined to form a larger element. Elements are defined by the number of protons in their nucleus. When nuclear

Black Holes

888 words - 4 pages Have you ever been watching Star Treck on T.V. and heard them mention something about black holes? Well, do you know what a black hole is? A black hole is so dense and has a gravity so strong, that they have an escape velocity, or the point in the black hole where objects can no longer return to space, of 299,792,458 meters per second. They can be as tiny as the point of a pin or as massive as fifty billion times the mass of our sun, Sol.Boom

The Herschel Space Observatory

894 words - 4 pages about Universe formation, and had uncovered some interesting discoveries; including some about Black Holes. While Herschel was studying the black-hole binary system GX 339-4 in a multi-wavelength observation campaign, they noticed changes in the source's X-ray and radio emissions signaling the start of powerful jets were being released from the black hole's surroundings. This meant that the observatory detected emissions from the base of black

Black Holes and Dead Stars

1630 words - 7 pages exceeds Chandrasekhar limit, the mass appropriate for white dwarf formation, but it still small enough to become the black hole. However, the main reason of their formation is still unclear. It begins its life as usual star, and goes through the main stages of the development: protostar, then growth up to subgiant and giant size, then the relatively stable existence due to the balance between gravitational and thermal pressure; and at last

Understanding Black Holes

3433 words - 14 pages , the curvature of space-time is extreme (Bunn, Black Holes FAQ). Moreover, the intense gravitational field of the black hole prevents any light or other electromagnetic radiation from escaping. But where lays the “point of no return” at which any matter or energy is doomed to disappear from the visible universe? The black hole’s surface is known as the event horizon. Behind this horizon, the inward pull of gravity is overwhelming

Black Holes

605 words - 2 pages Scientists have been trying to determine if black holes (earlier known as `frozenstars') truly do exist for several decades now. Thanks to the great Albert Einstein and his theory of relativity, researchers have been able to predict the cosmic phenomenon of black holes. A black hole is basically an area of space that has an unbelievably high area of concentrated mass for the space it occupies, making it impossible for an object to escape its

Black Holes

710 words - 3 pages Black holes are regions in space that have so much mass, nearby objects and even light can't escape its gravitational pull. Black holes are thought to form from heavy stars. When these stars end their lives in a supernova, their cores collapse and gravity wins out over any other force that might be able to hold the star up. (http://design.lbl.gov/education/blackholes/, 1/15/06)Black holes cannot be seen because there is no light coming out of

Similar Essays

Black Holes: Forces Of Gravity Essay

1992 words - 8 pages Science has always been about analyzing the hard facts in front of you, even if they might be invisible to the naked eye. Sizable leaps in our understanding about the mechanisms of life and our universe are in the process of being made with scientists believing black holes are the major precipice to these greater understandings. Black holes push and break many modern understandings of physics and time with many mysterious qualities

What A Black Hole Really Is

2021 words - 8 pages (Freudenrich). The only physical properties within a black hole is mass, charge and angular momentum. From these three properties, a type or a status was given; charged black holes, rotating black holes, or stationary black holes (Black Holes). Though these are just types, actual names were given to them such as Schwarzschild for non-rotating and Kerr for rotating black holes (Freudenrich). Formation of black holes are jaw dropping to say the least

Black Holes And Stephen Hawking Essay

1155 words - 5 pages . That all the information that enters the ring doesn’t get destroyed, but changes the information into radiation. With this current research, it has the potential to change everything that is known about black holes. Works Cited Fryer, Chris L. "Mass Limits For Black Hole Formation." The Astrophysical Journal 522.1 (1999): 413-18. Print. Hawking, S. W., and G. F. R. Ellis. "Gravitational Collapse and Black Holes." The Large Scale Structure of

Black Holes Essay 1575 Words

1575 words - 7 pages saying how many of our suns could fit in the object, so something that is 100 solar masses is 100 times bigger than our sun. This is considered a baby compared to the second type of black hole out there. The second one is called a supermassive black hole and this one could be millions or billions of solar masses. The biggest one scientists have found so far is 17 billion solar masses. The formation of supermassive black holes is the mystery for