The Birth And Death Of Stars

1221 words - 5 pages

Between the stars, there is a region, called the interstellar medium, which contains huge clouds of gases and solid particles. It is comprised of about 75% hydrogen, 25% helium, and traces of carbon, nitrogen and other elements. The clouds, called nebulae, are cool and relatively dense and are shaped by currents of hot, low-density gases. It is in these nebulae, that certain processes come together to form stars.Stars form when a shock wave passes through a nebula, compressing the clouds and causing the gases and dust there to clump together. Gravity pulls the material together in the center, accelerating the atoms, increasing the density and generating heat, creating what is calle ...view middle of the document...

The star contacts and its outer layers expand, become cool, and less luminous. The star gradually moves up and to the right on the H-R diagram. The duration of a star depends on its mass since the stars with the greatest mass consume fuel rapidly and have relatively short lives (millions of years). A low mass star conserves its energy and can live for billions of years. (Seeds)During its life, a star burns up its hydrogen in a nuclear fusion reaction. Once the hydrogen is consumed, if it has enough mass, it can then begin to fuse together its other elements, such as helium, for fuel. It will continue on this path until finally it cannot fuse together any of the remaining elements into fuel. It is then that the star begins to die. All stars evolve, get older, move around on the H-R chart, and eventually explode or die. The particular form it takes when it dies directly depends on the star's size at its birth.A very low mass star--a red dwarf--lower than half our sun's mass--consumes its hydrogen very slowly. It is totally convective, which means the rising hot gases from the core and the sinking cooler gases from the shell continuously stir the stellar materials. It is not hot enough to fuse helium or any of the other heavier elements, but consumes all of its hydrogen uniformly. Astronomers predict that Red Dwarf stars can live for a hundred billion years so no Red Dwarf has yet died.More massive stars that are higher up on the main sequence have a different fate. Their greater mass means that their core and shell are not totally conductive and they have different reactions. When the hydrogen at the core of these stars fuse, the star's core fills with the byproduct, helium. When the star eventually runs out of hydrogen at its core, it is not hot enough to fuse helium, so the core begins to cools. Once it begins to cool, the outward pressure that the heat had generated lessens, and the core begins to contract. This contraction will, in turn, cause the core to heat up as the gravitational energy of the contraction converts to thermal energy. Some of the thermal energy (heat) is passed to the unprocessed hydrogen outside of the core. When this heats up enough, a hydrogen fusion reaction begins in this shell. This reaction continues to expand outward, heating...

More like Paper On The Birth And Death Of Stars

Essay On Under The Guidance Of Stars

1305 words - 6 pages ... Under the Guidance of Stars, The Master said: "Governing with excellence can be compared to the North Star: the North Star dwells in its place, and the multitude of stars pay it tribute" -The Analects of Confucius - Book 2. 1 In a text grand in both scope and influence, chock full of opaque wisdom, pithy aphorisms, apparent contradictions, and idiosyncratic pupils, choosing simply one passage through which one can glean the essence of ...

Essay On The Birth Of The Republic

3718 words - 15 pages ... The Birth of the Republic Study Guide 1. According to the author of this book, the history of the American Revolution is the history of the Americans' search for ____. a. Search for Principles 2. What does the author state was the reputed nature of the American colonists prior to the Revolutionary War era? a. The American colonists were reputed to be a quarrelsome, litigious, divisive lot of people. 3. What forms of evidence does the ...

Stereotyping Black Americans And The Deep South In "THE BIRTH OF A NATION" Movie

1366 words - 6 pages ... "THE BIRTH OF A NATION": Epic D.W. GriffithThe "Birth of a Nation", by David Wark Griffith, is a 1915 silentfilm based on the book The Clansman, written by Thomas Dixon. Accordingto the liner notes included with this video re-release, Griffith hasbeen given the title of "The Father of Hollywood" with "Birth" being oneof his most classic films. He makes use of many accomplished actors and actresses of his time including: Lillian Gish, Mae Marsh ...

Essay On God, The Answer Of Life And Death

2001 words - 9 pages Free ... Ever since people could imagine, they questioned what is life, what is the meaning of life and what happens after death. Religion is the answer. Christianity, Judaism, and Islam are the Western religions, or Abrahamic religions, because they all believe in Abraham, an important prophet in all three faiths. These religions believe in one all-powerful God who created the world.1 There are many Eastern religions, but the main two are Hinduism and ...

The Death Penalty And Its Flaws - University Of Texas - Essay

1554 words - 7 pages Free ... Majok| 2 Garang Majok Phil West WRC 1023 02 November, 2018 Capital punishment is a widely accepted belief that legally authorizes killing of someone as punishment for a crime. “At year-end 2016, a total of 32 states and the Federal Bureau of Prisons (BOP) held 2,814 prisoners under sentence of death”( Capital Punishment in the United States). Although only 36 of those prisoners were actually executed the long process and the feelings associated ...

Political, Psychological, Economic And Social Aftermath Of The Black Death

2542 words - 11 pages ... An epidemic stroked the medieval world in 1347 which depopulated it and brought a great number of consequences. These consequences, however, were not entirely bad consequences in the long run. In the long term, the Black Death created a more diversified economy based on more intensive use of capital, more powerful technology and created a higher standard of living. In short term, however, new laws emerged which restrained trade and also allowed ...

Brief Outline Of Death And Diseases In The Medieval Era

951 words - 4 pages ... (breath), and other senses.People were likely to suffer early death in the Medieval Times because there were no cures and they relied on superstitions.Diseases spread quickly in Medieval cities because they were not very knowledgeable about diseases and didn't know about quarantine and how to stop the disease spreading.An epidemic is 'An outbreak of a contagious disease that spreads rapidly and widely'.Some of the things that the Medieval people ...

Masqerade Of The Red Death

1391 words - 6 pages ... Yashley Pagan Pagan 1Mr. KautzHonors American Literature27 October 2014Pagan 2Masque of the Red DeathIn the "Masque of the Red Death," Poe uses the setting, characterization, and metaphor to show that death can be unexpected and unavoidable.The author, Edgar Allen Poe, uses setting to represent death and show that it is unexpected. In the passage, he uses different colors to represent each room in the castle. The first room is a light blue color ...

Salvador Dali-'geopoliticus Child Watching The Birth Of The New Man'-conceptual Framework

932 words - 4 pages Free ... Geopoliticus Child Watching the Birth of the New ManSalvador Dali (1904-1989)1943. Oil on linen canvas, 46.1x 52 cm. Salvador Dali museum, St Petersburg.SurrealismARTISTSalvador Felipe Jacinto Dali was born in 1904 in Spain. He was treated like royalty by his poor parents as they thought of him as the incarnation of his brother who had died 9 months before Salvador's birth. This constantly reminded him of death later resulting in his obsession ...

The Masque Of The Red Death

288 words - 2 pages ... "The Masque of the Red Death," is a story about a prince who abandons his people, and locks himself with his army in a castle to escape the "Red Death." The wise prince thinks the "Red Death" would never be able to reach him. However, in the end, the prince is not able to escape from the "Red Death". The theme of this story is there are no escapes from death; everyone would face death when death comes. In the story, the author implies a lot of ...

Advance Directive And Their Purpose In The Healthcare Field - Sociology Of Death And Dying - Advance Directive

698 words - 3 pages ... and family members are making the decisions for you. Many Americans will face questions about medical treatment and advanced directives but may not be capable of making those decisions, for example, in an emergency or at the end of life situation, understanding which advance care suits you. Begin planning and putting things in place because it involves learning the different types which are available and which decisions that may need to be made ...

Did The Parents Reflect The Death Of Romeo And Juilet - Language Arts - Essay

958 words - 4 pages Free ... blamed for their children's deaths. Both of the families can be blamed for their children's death because the families have a big feud going on that leads them not being able to be together. As it states in the text, " from forth the fatal loins of these two foes"(prologue). To explain, the hatred of the two families is still continuing with Romeo and Juliet making them think they have to hate each other. When they want to be together its hard with ...

Romanticism & Eugene Delacroix: Also A Look At The Death Of Sardanapalus And Liberty Leading The People

1138 words - 5 pages ... what the artist was actually seeing.Romantic art was launched by Theodore Gericault's The Raft of the Medusa, which was based on a shipwreck that caused a huge political scandal. Succeeding Géricault's death, Ferdinand Victor Eugène Delacroix, a temperamental and private man, became the leader of the French Romantic movement.EUGÈNE DELACROIXEugène Delacroix was born on April 26, 1798 in Charenton-St-Maurice, France to a ...

Capital Punishment And The Death Penalty

514 words - 3 pages ... , such as: Matthew, Corinthians, Peter, and Hebrews. These are just a few; there are several more. The English used the Bible as a guide for crimes that would seem just under the punishable by death rule. Most of the laws and court structure in the United States are based on the old English system.Our society has become increasingly violent. I remember my parents saying that they used to leave their house open and their cars unlocked. You definitely ...

Who Is To Blame For The Death Of Romeo And Juliet - Grade 10 - Essay

756 words - 4 pages ... themselves from the mere thought of life without one another. Shakespeare uses the term “star-crossed lovers,” as an allusion to the belief that stars and planets have the power to control events on Earth. Romeo and Juliet’s unfortunate ends can be partially considered as their own fault although other events and people play significant roles in it. Romeo's hastiness leads him to his early death. An example of this is the agreement to marry Juliet ...