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Stars formation and existence
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A star is a self-radiant divine body consisting of a mass of gas held together by its own gravity. The birth of a star begins inside a molecular cloud. Stars form inside these somewhat dense concentrations of interstellar gas and dust. The process of star formation has long been a mystery because of viewing limitations. Large amounts of small solid particles blocked our view of the stars which are beyond the molecular cloud.
Infrared technology now provides some insight on how a star is formed. Cloud cores contain sources of fierce infrared radiation, evidence of energy from collapsing protostars (potential energy converted to kinetic energy). Also, young stars are found surrounded by clouds of gas, the leftover dark molecular cloud. Young stars with warm cores usually appear in clusters, groups of stars that form from the same cloud core. We will discuss what special elements are included in molecular clouds that bring about the birth of stars.
Basic Cloud Characteristics
Molecular clouds are considered the densest parts of the interstellar medium in galaxies. They were dis...
In the short story, “the Space Between the Stars”, by Geeta Kotari, it is evident that Maya, a woman from India that grew up in the U.S., longs to find self-worth, happiness and belonging, but struggles due to her traditions and culture. Throughout the story, Maya feels restricted by the ideas taught to her during her childhood. She wants these restrictions lifted. For example, Kotari states “[m]aya’s sole desire; to be like everyone else and not like her aunt, who still lived in the culture she’d left over 30 years ago” (104). This quote demonstrates Maya’s longing to belong in mainstream Americans society.
The movie, “Twenty Feet From Stardom,” was released in 2013. It focuses on the careers of backup singers, who have shared their voices to support some of the greatest artists of the past several decades. The film is an interview-based documentary. From the film, we meet a serious of amazing and talented vocalists, such as Darlene Love, the first black backup singer; Merry Clayton, a lead backup singer; Lisa Fisher, Tata Vega, and Judith Hill. They all share their stories of enjoyment, happiness, or even struggles in making music with others. There is no doubt on the fact that backup singers take very low credit, sometimes even no credit at all. They often just go there and make the thing sound great, and then go home quickly. It is even worse that sometimes people do not want to pay
In using this allusion, Frost not only continues the "poetic tradition" but adds all the depth of meaning of Keats' poem to his own. The star doesn't want much of us -- only to stay above us. He says that "when the mob is swayed" or when social, political, or moral upheaval takes place and the norm is to be radical, the star likes being above it all, condescendingly regarding the earth. When this happens, we should "choose something like a star" and concentrate on it.
Waller, William H. The Milky Way: An Insider's Guide. Princeton, N.J: Princeton UP, 2013. 42+. Print.
As Clarice Lispector was writing what would become her last literary creation, The Hour of the Star, little did she know that while her body was plagued with the devastations of cancer, her mental struggle for peace and grace in death would inspire her most renowned novel. Perhaps it is because of those circumstances, she created a novel with intuitive reflections on both life and death, as seen through the life of the main character, Macabea. The story is narrated by Rodrigo S.M., and although Rodrigo attempts to maintain a neutral stance, he is often conflicted by his own perceptions and feelings. At the book’s commencement Rodrigo spends quite some time explaining that while the story is mainly about a woman, having the book narrated by a female would weaken the richness of content. He explains that a woman is incapable of clearly emphasizing the harshness of reality; that she is too emotional and attempting to explain the life of a wretched girl would be hard because her emotions would not allow an unbiased depiction of the cruelties of life. Macabea is introduced in the novel as a poor girl who does what she must to survive in the slums of Rio de Janeiro. She is, Rodrigo remarks, nothing out of the ordinary. Physically there is nothing about Macabea which sets her apart from the other countless street rascals who live hand to mouth. He then provides readers with some of her early life history, including how she almost died at birth because of rickets, and how both her parents succumbed to typhoid fever when she was a toddler. Finally after their death Macabea was forced to move in with her aunt, who too eventually passed away, but not before procuring the child a job to support herself. In the course of the novel the popular culture, though vague and metaphorical at times, affects Macabea and the secondary characters personalities and actions.
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.
Stars are born and reborn from an explosion of a previous star. The particles and helium are brought together the same way the last star was born. Throughout the life of a star, it manages to avoid collapsing. The gravitational pull from the core of the star has to equal the gravitational pull of the gasses, which form a type of orbit. When this equality is broken, the star can go into several different stages. Some stars that are at least thirty times larger than our sun can form black holes and other kinds of stars.
Solar nebula is a rotating flattened disk of gas and dust in which the outer part of the disk became planets while the center bulge part became the sun. Its inner part is hot, which is heated by a young sun and due to the impact of the gas falling on the disk during its collapse. However, the outer part is cold and far below the freezing point of water. In the solar nebula, the process of condensation occurs after enough cooling of solar nebula and results in the formation into a disk. Condensation is a process of cooling the gas and its molecules stick together to form liquid or solid particles. Therefore, condensation is the change from gas to liquid. In this process, the gas must cool below a critical temperature. Accretion is the process in which the tiny condensed particles from the nebula begin to stick together to form bigger pieces. Solar nebular theory explains the formation of the solar system. In the solar nebula, tiny grains stuck together and created bigger grains that grew into clumps, possibly held together by electrical forces similar to those that make lint stick to your clothes. Subsequent collisions, if not too violent, allowed these smaller particles to grow into objects ranging in size from millimeters to kilometers. These larger objects are called planetesimals. As planetesimals moved within the disk and collide with one another, planets formed. Because astronomers have no direct way to observe how the Solar System formed, they rely heavily on computer simulations to study that remote time. Computer simulations try to solve Newton’s laws of motion for the complex mix of dust and gas that we believe made up the solar nebula. Merging of the planetesimals increased their mass and thus their gravitational attraction. That, in turn, helped them grow even more massive by drawing planetesimals into clumps or rings around the sun. The process of planets building undergoes consumption of most of the planetesimals. Some survived planetesimals form small moons, asteroids, and comets. The leftover Rocky planetesimals that remained between Jupiter and Mars were stirred by Jupiter’s gravitational force. Therefore, these Rocky planetesimals are unable to assemble into a planet. These planetesimals are known as asteroids. Formation of solar system is explained by solar nebular theory. A rotating flat disk with center bulge is the solar nebula. The outer part of the disk becomes planets and the center bulge becomes the sun.
If the nebula is dense enough, certain regions of it will begin to gravitationally collapse after being disturbed. As it collapses the particles begin to move more rapidly, which on a molecular level is actually heat, and photons are emitted that drive off the remaining dust and gas. Once the cloud has collapsed enough to cause the core temperature to reach ten-million degrees Celsius, nuclear fusion starts in its core and this ball of gas and dust is now a star. It begins its life as a main sequence star and little does it know its entire life has already been predetermined.
A star begins as nothing more than a very light distribution of interstellar gases and dust particles over a distance of a few dozen lightyears. Although there is extremely low pressure existing between stars, this distribution of gas exists instead of a true vacuum. If the density of gas becomes larger than .1 particles per cubic centimeter, the interstellar gas grows unstable. Any small deviation in density, and because it is impossible to have a perfectly even distribution in these clouds this is something that will naturally occur, and the area begins to contract. This happens because between about .1 and 1 particles per cubic centimeter, pressure gains an inverse relationship with density. This causes internal pressure to decrease with increasing density, which because of the higher external pressure, causes the density to continue to increase. This causes the gas in the interstellar medium to spontaneously collect into denser clouds. The denser clouds will contain molecular hydrogen (H2) and interstellar dust particles including carbon compounds, silicates, and small impure ice crystals. Also, within these clouds, there are 2 types of zones. There are H I zones, which contain neutral hydrogen and often have a temperature around 100 Kelvin (K), and there are H II zones, which contain ionized hydrogen and have a temperature around 10,000 K. The ionized hydrogen absorbs ultraviolet light from it’s environment and retransmits it as visible and infrared light. These clouds, visible to the human eye, have been named nebulae. The density in these nebulae is usually about 10 atoms per cubic centimeter. In brighter nebulae, there exists densities of up to several thousand atoms per cubic centimete...
The idea behind the Solar Nebular Hypothesis is that the solar system was condensed from an enormous cloud of hydrogen, helium, and a few other elements and rocks. Around five billion years this cloud of materials began to spin and contract together into a disk shape under their own gravitational forces. The particles started combined together, protoplanets, to eventually form planets. A great mass of the material eventually began to form together, protosun, and make up the sun.
The Birth of Venus is a beautiful Renaissance canvas masterpiece created by Sandro Botticello. The picture illustrates the birth of Venus in a very mystical way. Venus has emerged from sea on a shell which is being driven to shore by flying wind-gods. She is surrounded by beautiful roses which are painted in a truly remarkable color. As she is about to step to land, one of the Hours hands her a purple cloak. The back drop includes the sea and a forest. The overall effect of this painting are almost overwhelming, color and beauty meet the eye in every angle.
Astronomers believe that most galaxies consist of a supermassive black hole at the center, which attracts all constituents of galaxies such as, dust, gases (mainly Hydrogen and Helium), atoms, stars, interstellar clouds and planets to the center by force of gravity, but are not sure whether all galaxies contain a black hole in the center. Galaxies keep moving in relative motion to one another and intermittently can come so close that the force of gravitational attraction between the galaxies may become strong enough to cause a change in the shape of the galaxies, while in exceptional cases, the galaxies may collide. If two galaxies collide, they may pass right through without any effect or may merge, forming strands of stars, extending beyond 100,000 light years in space (World Book Online Reference Centre, 2005). Hence, neighboring and often other colliding galaxies induce the sha...
One thing us as humans have never been able to fully understand is astronomy. Always having an unexplained mystery, astronomy also has served as a way to keep time and predict the future. The word “astronomy” is defined as the study of heavenly bodies, meaning anything in the sky such as stars, galaxies, comets, planets, nebulae, and so on. Many people, if not everyone, is amazed by the night sky on a clear, moonless night.