Evolution of stars ppt

Educational materials stellar evolution teachers guide chandra. Stellar evolution for low mass stars like the sun stellar evolution. For more information and the full suite of resources, v. The evolution of heavier and lighter stars are compared. First powerpoint about the solar system ppt file 2. Early history of the universe matter as we know it did not exist at the time of the big bang, only pure energy. Not in notes page 1 a star is a hot ball of mostly hydrogen gas. Stellar evolution the birth and evolution of stars 5112010 5112010 earth science 25. Tes global ltd is registered in england company no 02017289 with its registered office at 26 red lion square london wc1r 4hq. This presentation discusses the evolution of stars and what happens at each stage of their life. The fusion process forces hydrogen atoms together, transforming them into heavier elements such as.

Stars form from nebulas regions of concentrated dust and gas gas and dust begin to collide, contract and heat up all due to gravity 2nd step. Stars stars are massive balls of gas that give off light and heat. Stellar evolution and hertzsprung russell diagrams. Gravity is the force that keeps us safely planted here on earth, but it is more that just that. The universe, solar system, and planets i questions. Implications for stellar evolution theory powerpoint ppt presentation free to view. Chandrasekhar limit is the maximum mass for a white dwarf star chandrasekhar limit is 1. How stars evolve evolution of protostars onto main sequence gravitational contraction luminosity versus temperature and radius the fate of the sun red giant phase helium flash reading.

Free powerpoint presentations about stars and galaxies for. There is no sharp edge to the star, but for the the sun. The mass distribution of sdb stars from asteroseismology and other means. Choose your answers to the questions and click next to see the next set of questions. Implications for stellar evolution theory 40th liege international astrophysical colloquium the mass distribution of sdb stars from asteroseismology and other means. All stars start out as object collecting matter in a nebula, this stage is called a protostar, specifically t tauri type stars. The card sets are also available in pdf and powerpoint formats. Structure and evolution of the universe esa 62 overview the universe is a dynamic, evolving place. The true brightness of a star if all stars were at a uniform distance from earth absolute magnitude the brightness of a. Ppt evolution of stars powerpoint presentation free to. Depending on the mass of the star, its lifetime can range from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe. The key point is that businesses and, for that matter, projects, processes.

Our sun is a yellow dwarf older stars are called supergiants they can be colored red or blue. As they gather mass, they become hotter and denser. The end of a stars life depends critically on its mass. The life cycle of a star i can describe the life cycle of a star bell ringer what type of magnitude is each definition referring to. What are the stages of evolution of a star answers. Ppt stellar evolution powerpoint presentation free to. Origin of the universe did it begin with a big bang. Stellar evolution stellar evolution life of a star stellar evolution is the process in which the forces of pressure gravity alter the star. Two of the boundary conditions are fairly obvious, at the centre of the star m0, l0 at r0 at the surface of the star its not so clear, but we use approximations to allow solution.

As stars progress through life, their size, luminosity and radial temperature change according to predictable natural processes. Classifying stars cont a young star is called a dwarf star they can be colored red, yellow, or white. The sun will go through the same evolution as other stars, and in about 5 billion more years will have become a red giant. Higher mass stars spend less time on the main sequence determining the age of a star cluster imagine we have a cluster of stars. It is governed by cycles of matter and energy, an intricate series of physical processes in which the chemical elements are formed and destroyed, and passed back and forth between stars and diffuse clouds. Stars have, meaning that they are born and, after millions or billions of years, they. This website and its content is subject to our terms and conditions. Stars form inside an, which is a cloud of gas and dust. Evolution of stars more massive than the sun supernova explosions observing stellar evolution in star clusters the cycle of stellar evolution. Most of the stars in our galaxy, including the sun, are categorized as main sequence stars. The true brightness of a star if all stars were at a uniform distance from earth absolute magnitude the brightness of a star as it appears from earth with the naked eye. They exist in a stable state of nuclear fusion, converting hydrogen to helium and radiating xrays. Theoretical plots of the hr diagram are compared to real star data and observations. This section will describe those changes, focusing on the life cycle of the sun.

To improve your personal effectiveness on the job, learn how to assess the state of an organization. Evolutionary effects on these stars are not negligible, even for a middleaged star. How the planets got their names from ancient greece. Computer simulations of the nuclear reactions inside a star match up with what we observe. Below is an artists conception of how the stages might look from the same vantage point on earth from cosmos by c. The table shows the lifetimes of stars as a function of their masses. Studying star evolution is a whole branch of astronomy, and scientists are learning. If the temperature and the density of the core continue to rise, the irongroup nuclei tend to break down into helium nuclei, but a large amount of energy is suddenly consumed in the process. Critical success strategies for new leaders at all levels, michael watkins shares the stars model of business evolution for analyzing your business the stars model.