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Essays on blackholes
Essays on blackholes
Black holes research paper
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A legitimate point of science or are they just science fiction? While originally dismissed as a fanatical concept instead of legitimate celestial body black holes despite being elusive and very difficult to observe have been proven in recent years opening the theoretical possibilities wide open for these shadowy entities. Objects of extreme density and with a gravitational force so strong even light cannot escape from their pull they instill both a sense of awe and fear of the unknown. What exactly are these dark points of great mass and how do they effect the universe that quite literally in some cases swirl around them? We continue to ask these question and search for the through with theories and observations. Black holes were first theorized by Albert Einstein in 1916 with his general theory of relativity. With his general theory of relativity Einstein proposed that gravity isn’t just a force as Sir Iscaac Newton had formally stated. Instead gravity is a consequence of a distortion in space and time. These distortions vary but the more mass an object processes the more of a distortion they have on the fabric of space-time causing the other objects to be drawn in due to the distortion. For example the planets in our Solar system aren’t simply being pulled in by the sun but they are instead revolving around the warped space-time …show more content…
In truth though black hole has just about as much gravitational pull as other stars or cosmic objects of the same mass. Most objects would have to pass close by to ‘fall’ into a black hole in order become trapped by it’s pull. The point where an object reaches the point of no return and it is trapped in the gravitational pull is known as the event horizon. At this point escape becomes impossible as then the object would need to travel faster than the speed of light to escape. (Black
Terra Nullius which is referred as “land belonging to no one” was an obstacle in order to achieve Native Title which is the right to land by the original inhabitants, as the Indigenous people had to prove that they were traditional owners of the land with an ongoing connection to it in order to claim native title, which was difficult as they had been forced off their land almost 200 years before. In order to achieve the native title, it had to be claimed by people with the ancestors that inhabited and associated with the land before the European settlement.
The origins of the super-massive black holes which concludes how they were formed and what caused them to form is an unsolved problem which is yet a mystery of astrophysics. ( Millis 2014)
Geologist John Mitchell is credited with first devising the idea of a black hole. He said that if some force could compress the sun down to an small enough size, it would have a gravitational field so strong, that one would need to be going faster than the speed of light to escape it (UTFC). All objects in the universe have what is called a schwarzschild radius. An object’s schwarzschild radius is the radius that an object would have to be compressed into in order to have an escape velocity greater than that of the speed of light, or a black hole. (VSBH).
Since 776 BCE, the Olympics have been a way for people of different cultures to come together and compete in friendly competition. In 1892 the first modern Olympics were held in Athens, although it had been over a thousand years since the last game it still had brought together an assortment of different religions and ethnic groups together. Many factors shaping the Olympic Games reflect the changes that have taken place in our world since the last game in 393 CE in Greece such changes include woman’s suffrage, global economy, world wars, and proving competency.
The Cold War formed political, social, and economic struggles that impacted the two world superpowers, the United States and Soviet Union. The war began in 1947 at the end of WWII and lasted until the fall of the Soviet Union on December 26, 1991. During the 1950’s, the United States and USSR began their fight in space to prove who had better technology, military firepower, and also stronger social, political, and economic systems. Due to the political, social, and economic changes during the Space Race, the relationship between the United States and the Soviet Union began to drift apart. During the Cold War both the United States and Soviet Union were so caught up in the war that they formed tension within their relationship. This led to the Soviet Union and United States space programs to work even harder in their voyage in the Space Race.
Starting with black holes, Khalili describes the creation of one. I found that a black hole is what remains when a massive star dies. Because stars are so massive and made out of gas, there is an intense gravitational field that is always trying to collapse the star. As the star dies, the nuclear fusion reactions stop because the fuel for these reactions gets burned up. At the same time, the star's gravity pulls material inward and compresses the core. As the core compresses, it heats up and eventually creates a supernova explosion in which the material and radiation blasts out into space. What remains is the highly compressed and extremely massive core. The core's gravity is so strong that even light cannot escape. This object is now a black hole and literally cannot be seen because of the absence of light. Because the core's gravity is so strong, the core sinks through the fabric of space-time, creating a hole in space-time. The core becomes the central part of the black hole called the singularity. The opening of the hole is called the event horizon. Khalili describes that there are two different kinds of black holes:
Karl Schwarzschild is credited with being the brilliant astronomer who developed the concept of black holes. In 1916, using Einstein's general theory of relativity, he began to make calculations about the gravity fields of stars. He concluded that if a huge mass, such as a star, were to be concentrated down to the size of an infintessimal point, the effects of Einstein's relativity would get really fairly extreme. Schwarzschild doubted that a star could get that small, and theorized that if a star did infact shrink upon itself like that, its gravity would remain the same and the planets revolving around it would remain in the same orbits they always had. Since then however, some of Schwarzschild's theories have been disproved, but most of his initial theories hold intact today. The Schwarzschild Radius, the maximum radius a body with a specific mass can have that won't let light escape, is named in his honor, and the equation of which is still in use today: Rs=2MG/(c^2)
The idea of Black Holes was first proposed in the 1700s by scientists John Michell and Pierre-Simon Laplace, who argued, independant of each other, that there might be objects in the universe with such a large gravitational force, that even light could be trapped. Published in 1916 Einstein’s theory of general relativity which included how gravity does affect light’s motion, gave way to scientific discoveries involving black holes. In Einstein’s own theory, he was only able to approximate the solutions to some of his own equations, however Karl Schwarzschild was able to provide the solutions. These solutions described objects like black holes that had such massive density that nothing could escape them. Schwarzschild theorized that if an object had such a small radius, that the escape velocity will be greater than the speed of light. Because as previously mentioned, nothing is faster than the speed of light, the object would be sucked into itself by it’s own gravitational pull, which would cause the object to disappear. What r...
A Black hole is a theorized celestial body whose surface gravity is so strong that
In Bright Star, Keats utilises a mixture of the Shakespearean and Petrarchan sonnet forms to vividly portray his thoughts on the conflict between his longing to be immortal like the steadfast star, and his longing to be together with his love. The contrast between the loneliness of forever and the intenseness of the temporary are presented in the rich natural imagery and sensuous descriptions of his true wishes with Fanny Brawne.
Before I begin to speak about black holes, I will have to explain what the white glowing specks in the sky are. Without a star a black hole could not be formed. In the beginning of a star life a hydrogen is a major part of its development. Stars form from the condensation of clouds of gas that contain hydrogen. Then atoms of the cloud are pulled together by gravity. The energy produced from the cloud is so great when it first collides, that a nuclear reaction occurs. The gasses within the star starts to burn continuously. The hydrogen gas is usually the first type of gas consumed in a star and then other gas elements such as carbon, oxygen, and helium are consumed. This chain reaction of explosions fuels the star for millions or billions of years depending on the amount of gases there are.
Einstein and Newton are the most popular explanations of gravity to this day. After Einstein, there have been some new theories trying to disprove him. One new popular theory is called emergent gravity and it tries to explain the motions of stars in space. There are many conceptions about gravity that confuse many people. Many people believe space does not have gravity, which is understandable however this is false. Another common misconception is that objects that are farther apart have a strong gravity pull on each other, Newton proved this to be incorrect (“Gravity Misconceptions”). The simple basics of gravity are understood by scientists, but there is still no exact answer that explains just how gravity
Einstein himself, working at Princeton with Nathan Rosen had discovered that the equations of relativity actually represent a black hole as a bridge between two regions of flat space-time, a phenomenon known as the “Einstein-Rosen Bridge”. Later on, in 1963, the New Zealand mathematician Roy Kerr found that if a black hole is rotating, a singularity still forms, but in the form of a ring, not a point. It was believed that in principle, a particle may be able to fall towards the singularity, but if at some point moved through the hole instead of the ring, the particle may not be lost forever. Therefore, with these theories in mind, a particle falling into a black hole will fall through the ring that the singularity has become, then going through the Einstein-Rosen Bridge, eventually being spewed out of the white hole into another space-time continuum.
Initially, Albert Einstein was the person to predict the existence of black holes through his General Theory of Relativity, in which he had created several general equations that show the interaction of gravitation as a result of space being curved by matter or energy. In 1915, he published Einstein’s field equations, which specify how the geometry of space and time is influenced by whatever matter and radiation are present, and form the core of Einstein's general theory of relativity (Redd). The general theory relativity was the initial step in the process to finding out more information about black holes. As time went on, there were a few main contributors that solved these equations to help develop better theories on black holes. One of the most important contributors to the development of a better u...
Ever since the beginning of time there have been stars. Not only stars in the sky, but moons, planets, and even galaxies! Astronomy is defined as the branch of science that deals with celestial objects, space, and the physical universe as a whole. In other words it is the study of space, planets, and stars. Throughout the ages, many people have used astronomy to help them learn about the universe, our own planet, and even make predictions about life itself. Understanding astronomy means understanding where it originated, the different groups/cultures that used it, and modern purposes of the science of the stars.