logging in or signing up LIfe of a Star GECA Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 236 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: May 05, 2009 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Life Cycle of a Star : Life Cycle of a Star Nebula : Nebula 1st Stage of Life Ball of gas and dust that is pulled together by gravity Nuclear fusion starts as gas cloud becomes denser and hotter Nuclear Fusion? hydrogen atoms fuse into helium Creates the intense energy found in stars Protostar : Protostar As a nebula collapses and gravitational forces and rotation factor in a nebula will condense in the center. Eventually the amassed heat becomes enough to start nuclear fusion. Slide 5: Four types of stars make up the life of a star Main Sequence Giants Super Giants White Dwarfs Slide 6: Main Sequence (the Sun) 2nd stage Longest stage Hydrogen changes into helium which creates enormous amounts of energy The size of the star does not change much Slide 8: Giants and Supergiants 3rd stage Main Sequence star becomes a red giant Red giant? star that expands and cools once is loses all its hydrogen Center shrinks and atmosphere grows large and cools Slide 10: White Dwarf ?small hot star that is the leftover center of an older star Final stage Can shine for billions of years before they extinguish Slide 12: Hertzprung-Russell Diagram Shows the relationship between a star’s surface temperature and absolute magnitude Used to study the lives of stars Most stars lie along the main sequence portion of the diagram Slide 14: Age of stars Average stars become red giants then white dwarfs More massive stars explode into a variety of objects Slide 15: Supernova? gigantic explosion in which a massive star collapses Occurs after a massive star uses up its fuel source Neutron Star? a star that has collapsed to a point at which all particles are neutrons A neutron star that spins and sends out beams of radiation is called a pulsar Slide 19: Black Hole? an object that is so massive that light cannot escape its gravity Remnants of a supernova Astronomers can detect black holes by using X-ray telescopes Question 1 : Question 1 What kind of a star is the sun? Answer : Answer Main Sequence Question 2 : Question 2 What is the H-R diagram? Answer : Answer A graph that shows the relationship between a star’s temperature and absolute magnitude Question 3 : Question 3 What are the four main types of stars? Answer : Answer Main-Sequence Giants and Supergiants White Dwarfs You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
LIfe of a Star GECA Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 236 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: May 05, 2009 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Life Cycle of a Star : Life Cycle of a Star Nebula : Nebula 1st Stage of Life Ball of gas and dust that is pulled together by gravity Nuclear fusion starts as gas cloud becomes denser and hotter Nuclear Fusion? hydrogen atoms fuse into helium Creates the intense energy found in stars Protostar : Protostar As a nebula collapses and gravitational forces and rotation factor in a nebula will condense in the center. Eventually the amassed heat becomes enough to start nuclear fusion. Slide 5: Four types of stars make up the life of a star Main Sequence Giants Super Giants White Dwarfs Slide 6: Main Sequence (the Sun) 2nd stage Longest stage Hydrogen changes into helium which creates enormous amounts of energy The size of the star does not change much Slide 8: Giants and Supergiants 3rd stage Main Sequence star becomes a red giant Red giant? star that expands and cools once is loses all its hydrogen Center shrinks and atmosphere grows large and cools Slide 10: White Dwarf ?small hot star that is the leftover center of an older star Final stage Can shine for billions of years before they extinguish Slide 12: Hertzprung-Russell Diagram Shows the relationship between a star’s surface temperature and absolute magnitude Used to study the lives of stars Most stars lie along the main sequence portion of the diagram Slide 14: Age of stars Average stars become red giants then white dwarfs More massive stars explode into a variety of objects Slide 15: Supernova? gigantic explosion in which a massive star collapses Occurs after a massive star uses up its fuel source Neutron Star? a star that has collapsed to a point at which all particles are neutrons A neutron star that spins and sends out beams of radiation is called a pulsar Slide 19: Black Hole? an object that is so massive that light cannot escape its gravity Remnants of a supernova Astronomers can detect black holes by using X-ray telescopes Question 1 : Question 1 What kind of a star is the sun? Answer : Answer Main Sequence Question 2 : Question 2 What is the H-R diagram? Answer : Answer A graph that shows the relationship between a star’s temperature and absolute magnitude Question 3 : Question 3 What are the four main types of stars? Answer : Answer Main-Sequence Giants and Supergiants White Dwarfs