life cycle of stars Essay - 2519 Words

LIFE CYCLE OF A STAR Stars are formed in nebulae, interstellar clouds of dust and gas (mostly hydrogen). These stellar nurseries are abundant in the arms of spiral galaxies. In these stellar nurseries, dense parts of these clouds undergo gravitational collapse and compress to form a rotating gas globule. The globule is cooled by emitting radio waves and infrared radiation. It is compressed by gravitational forces and also by shock waves of pressure from supernova or the hot gas released from nearby bright stars. These forces cause the roughly-spherical globule to collapse and rotate. The process of collapse takes from between 10,000 to 1,000,000 years. A Central Core and a Protoplanetary Disk: As the collapse proceeds, the†¦show more content†¦Stars like our Sun live for about 10 billion years. Stars less massive than the Sun have even longer life spans. The energy the star gains by fusing these atoms keeps it from collapsing. If a star is massive enough, it will fuse heavier and heavier atoms -- hydrogen to heluim, heluim to carbon, carbon to ... until ... elements are fused into iron. Fusing iron to form heavier elements actually requires energy, so the star would not gain anything by continuing fusion of iron atoms. Most of the stars life is spent fusing hydrogen into helium. Our sun has been doing this for some five billion years, and is expected to continue doing it for another five billion or so years. This hydrogen burning starts from the very center of the star, and moves its way out, leaving a core of helium behind. Low Mass Stars If the star is small enough (much less than the mass of our Sun), it never gets beyond hydrogen burning. This is because its central temperature never gets high enough to start fusing helium into carbon. Once such a star has used up most of its hydrogen, it will begin to cool and collapse into a quot;brown dwarfquot;. Intermediate Mass Stars Stars with masses close to that of our Sun (up to about five times the mass of our Sun) will experience helium-to-carbon burning in their cores. Outside the helium core, hydrogen will continue burning into helium. At this point, the outer layers of the star will expand to conserve energy --Show MoreRelatedLife Cycle of Stars2606 Words   |  11 PagesLIFE CYCLE OF A STAR Stars are formed in nebulae, interstellar clouds of dust and gas (mostly hydrogen). These stellar nurseries are abundant in the arms of spiral galaxies. In these stellar nurseries, dense parts of these clouds undergo gravitational collapse and compress to form a rotating gas globule. The globule is cooled by emitting radio waves and infrared radiation. It is compressed by gravitational forces and also by shock waves of pressure from supernova or the hot gas releasedRead MoreLife Cycle Ofthe Stars1483 Words   |  6 PagesTHE LIFE CYCLE OF THE STARS The Life Cycle of the Stars SCI 350 January 12, 2006 Abstract Stars come in many definitions and in many forms today, there are Rock Stars, Movie Stars, There is even star shaped cereal for children but the most important stars we have our in our solar system. Lets look at the stars in the sky and space their origins of birth there attributes of life and there accolades in death. The Life Cycle of the Stars To discover the stars origin we look for its definitionRead MoreThe Life Cycle of a Star Essay733 Words   |  3 PagesLife Cycle of a Star Our Sun is a perfect example of a star, and there is an incredible amount of stars in the Universe. It is a star among hundreds of billions of stars within our Milky Way Galaxy, and our galaxy is one of billions of galaxies in the universe. Stars live for a very long time; millions, billions, or tens of billions of years so we can never really observe the life of a star; its birth, life, and death. In determining the life cycle of a star, astronomers observe many of theRead MoreThe Process of The Life Cycle of A Star Essay972 Words   |  4 Pagesgalaxy, there are over 100 billion stars alone.† (â€Å"Extreme†). Each one of those stars is a factory which slowly builds the materials for the foundations of the universe (â€Å"Stars†). Stars are as varied as people. While they are all born the same way, they do not all die the same way. Some stars live fast and die young; others die slowly and quietly (â€Å"Extreme†). The life cycle of a star is violent, they churn, pulsate, and sometimes explode, but the products of its life are invaluable building blocks forRead MoreScience of Stars Paper1326 Words   |  6 PagesScience of Stars Paper Diana L. Mieltowski SCI/151 September 27, 2010 Robert Austin Science of Stars Paper In this paper I will explain how astronomers determine the composition, temperature, speed, and rotation rate of distant objects using various methods. I will explain the properties of stars. I will also summarize the complete lifecycle of the Sun and determine where the Sun is currently in its lifecycle. Measurement of Distant Objects Light is a type of energy. Light behaves likeRead More The Life of a Star Essay652 Words   |  3 Pages The Life of a Star One night while little Jimmy was out camping with his father, he asked his father how a star is made? And his father said there are high-mass stars, intermediate-mass stars, and low-mass stars. The life cycles of stars follow three general patterns each associated with a range of initial mass. Much like human beings stars have a life cycle, they go threw birth, evolution, and death. And little Jimmy said how is that possible? First the star must be born. Many astronomers believeRead MoreBCG Matrix and the Product Life Cycle1394 Words   |  6 PagesIntroduction: The BCG Matrix and the Product Life Cycle are two important tools that relate to different aspects of a product’s performance: †¢ The BCG looks at market share and market growth and how they impact on cash usage and generation. †¢ The PLC looks at sales/revenues over time and levels of profitability. Boston Consulting Group (BCG) Matrix Businesses must keep their product offerings relevant and profitable to stay in operation. The Boston Consulting Group developed a tool, calledRead MoreThe Death Of A Star1241 Words   |  5 PagesHumans If a person was to be asked to describe our life stages, they would probably say something like â€Å"people are born, they live, and then they die.† Of course, they aren’t wrong, but we humans go through beautiful stages before reaching death. We go through stages such as infancy, childhood, adolescence, and adulthood. In many ways, Stars are just like humans. They also go through astonishing stages, all leading up to its death. The death of a star will probably be one of the most beautiful and terrifyingRead MoreSuperhero Element Essay1457 Words   |  6 Pagesits born in the star life cycle What is your element’s name, atomic number, and symbol? My element is Iron. It has an atomic number 26 and is expressed with a symbol as Fe. How was your superhero element formed (supernova, human made, low mass star’s death)? When a star is born, it is because it has enough mass to create enough heat, gravity and pressure to sustain nuclear fusion. Fusing hydrogen atoms to helium gives off enormous amounts of energy, and the star spends its life quietly fusing awayRead MoreTermar Neebula Made Out Of Stars Essay823 Words   |  4 Pageswhen it gets to the hot center it eventually becomes a star. Red Super Giant: A Red Supergiant is aning giant star that has consumed its core’s supply of hydrogen fuel.Helium has something in its core. Hydrogen is a undergoing nuclear fusion in other shells. Shells expand.The phases are diverse that are hard to believe that they are just the same star.During the various points of the star’s life,different things depending on the size.A large star and only with a mass of about ten solar unties will become