Black Holes Essay

Furthermore existence that black holes exist comes from the observations of astronomers of bursts of energy which are detected and then lost. An event horizon is an area of space around a black hole for which nothing can escape, once an object or any matter crosses this event horizon the gravity of the black hole will be too strong for it to escape. As a cloud of gas swirls and nears a black hole, the gases heat up and will emit x-rays. Astronomers have observed instances of several burts of x-rays being detected and then disappearing at areas where black holes are thought to be found. This may be caused by the gases emitting x-rays and then crossing the event horizon and disappearing forever. The observations of these bursts of energy are useful for astronomers in finding black holes.

Stars like our Sun, which are no more than 1.44 solar masses, will undergo fusion of hydrogen into helium. Over its life time the star slowly uses its supply of hydrogen by fusing it into helium. These reactions require high temperatures. Eventually the star will completely fuse hydrogen into helium in its core leaving inadequate amounts of thermal pressure to balance gravity. This will cause the centre of the star to contract to compensate for the heat energy lost.

After the core of a star has depleted all its hydrogen in fusion, it undergoes its final stages of its life, or in other words, its death. The process path of a dying star depends on its mass. Low mass stars, from about 0.4 up to 8 solar masses will evolve from a planetary nebula to a white dwarf. Stars with larger the 8 solar masses will form supernovae, than either a neutron star for intermediate stars (8-25 solar masses) or a black hole for high mass stars (greater than 25 solar masses).

At the end of the sun's life it will tar into a redgin star in a billion of years. The sun will throw off its over layers and become a plantery newborn. All that will be left of the sun is a cooling white dwan star. Nasa is learning black holes using spacecraft like the x-ray obvertory. They are also using ferm; grammarly ray space telescope (Dunbar). Black hole is a different kind of supernova. Black holes are hotter than stars. The center of a black hole is dense but not as hug itself. A black hole can be 2,000,000 times smaller than are sun. We can not observe black holes directly, but can be detected. Speed of light galaxies are have 20 billion solar masses. Univer stars gravitational field materact. Stars, light years, supernovas, and light bursts in the univers. The mass of the earth is 2,000,000 times smaller than the sun and can fit in your palm. Supermassive black holes culrk in the centers of the galaxies. The stares can become mostly iron, most stars elements in the universe. There may be camofluge black holes in are milkyway galaxy. Black holes are made by collapsed stars. Supermassive black holes might tie at many galaxies. A young star burns hydrogen at its core.

​Is it possible for a black hole to destroy the earth or not? Since Black holes can happen anywhere and in any galaxy or solar system, I am out to prove that these terrifying singularities can or cannot destroy our earth, and why? From researching articles published by National Geographic, Sea and Sky, the National Aeronautics and Space Administration (NASA) and other publishers, I will conclude with black holes earth destroyers or not?

In conclusion Black Holes are not Sci Fi anymore, because we can observe them, they give off gamma rays which traces back to black holes, and they come from stars with large mass. Though they were once thought to be the work of Sci Fi writers we now know that they are really out there, nomading their way. But even though they seem all powerful (and they are to some matter), they too have to follow the laws of gravity and can’t just barge into our galaxy. So we don’t have to worry about some random black hole swallowing us. But if it did come and

Stars will outlive the average human beings by about ten billion years. But stars, just like humans, go through a life cycle that adjusts to many different paths. A star is a spherical brilliant object that lies somewhere in the galaxy. The closest star to Earth is the sun. The sun is a form of heat and light that Earth receives every day. Humans need this Heat and light to survive, that is why stars are so important to the life of humans. Stars start out as nebulae and continue to form, depending on mass, into protostars, planetary nebulas, white dwarfs, black dwarfs, neutron stars or black holes.

Active Galactic Nuclei (AGNs) are very luminous and dense regions in the center of galaxies believed to host Super Massive Black Holes (SMBHs). The electromagnetic radiation sent out from AGNs is conjectured to come from matter that the SMBHs accrete which then takes the form of an accretion disk circling the black hole. These accretion disks are best approximated with an irregular density and temperature distribution made up by very hot gas and plasma~\citep{skadowski2015global}.

Despite its invisible interior, the presence of a black hole can be inferred through its intersection with other matter and with electronic radiation such as visible light. Matter that falls into a black hole can form an external accretion disk heated by friction, forming some of the brightest objects in the universe. If there are other stars orbiting a black hole, their orbits can be used to determine the black holes mass and location. Such observations can be used to exclude possible alternatives such as neutron stars. In this way, astronomers have identified numerous stellar black hole candidates in binary systems, and established that the radio source known as sagittarius. At the core of our own Milky Way galaxy contains a supermassive black hole of about 4.3 million solar masses. On February 11th, 2016 the LIGO collaboration announced the first observation of gravitational waves; because these waves were generated from a black hole merger it was the first ever direct attention of a binary black hole

Black Holes are the universe's most mysterious objects known to mankind. It lies in the darkness waiting and waiting for something...anything to come up and devour it without a trace. Black Holes are relatively new to humans, but we know that they’ve been here for millions and millions of years. Many people are unaware of the history of black holes, how a black hole is created and its function , and how there were theories leading up to black holes.

To better understand what is going on, scientists make an analogy of a brewing thunderstorm; the gasses that stay in the sky are the heated gasses which never return to the black hole's system. The falling rain, however, represents the portions of the system which are recollected into a galaxy.

Another method in physics on how to time travel is through black holes. A black hole has been discovered by Einstein's theory of general relativity, which showed that when a star dies, it leaves behind a small, dense remnant core. If the core’s mass is more than the sun, the force of gravity overwhelms all other forces in which it transforms into a black hole. Scientists have said that black holes can destroy anything that goes in it and it could be hard to get out of a black hole, once something went in it. In an interview by physicist Lior Burko, he states, “One possibility is that black holes may allow us to travel to very remote places in the universe, or another universe entirely,” (Kahney, “Black Holes and Space Time”). Black holes may have evidence that there are different kinds of parallel universe. Even though it is still unclear what black holes can do as in destroying everything that it goes in or if it leads someone to time travel into another parallel universe. Scientist are trying to create a black hole, here on earth, to see what blacks can do as in sending information to another universe.

This 'blink of an eye' delay was calculated to represent a maximum distance of 19,000 miles (30,000 km), impossible to resolve at the distance of V404 with any current telescope.

Black holes are regions in the universe where gravity is so strong and overpowering that it pulls in every other force that is caught within the event horizon. An event horizon is the area around the black hole that makes it impossible for anything to escape its grasp. According to National Geographic magazine, “Black holes are the cold remnants of former stars, so dense that no matter—not even light—is able to escape their powerful gravitational pull.” It is a boundary in space and time beyond which events aren’t able to affect a spectator on the outside. It is also known as “the point of no return”. At this point, the gravitational pull is so great that escape

Did you know that stars don’t stay as stars, they change over the course of time. Stellar Evolution is the star's life cycle. It includes the birth, life, and death of a star. Stars die out due to their mass because their fate depends on it. Stars have two main masses so, each mass results a different ending for each star. The two main masses are Low Mass and High Mass. These two masses of stars have different endings, so let us begin on each of their life cycles.