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Stars Part 2

Stars Part 2. By: Damian Draayers And Pasha Sekhon. You Will Learn…. • Color and temperature • Size • Hertzsprung-Russell Diagram • Motion • Arc second • Famous Stars • Spectroscopes. Color and Temperature. Lots of different temperatures Red stars are coldest, 3000 °C

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Stars Part 2

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  1. Stars Part 2 By: Damian Draayers And Pasha Sekhon

  2. You Will Learn… • Color and temperature • Size • Hertzsprung-Russell Diagram • Motion • Arc second • Famous Stars • Spectroscopes

  3. Color and Temperature • Lots of different temperatures • Red stars are coldest, 3000°C • Yellow stars are moderate, 6000°C (Sun) • Blue stars are the hottest, 20 000°C to 35 000°C

  4. Sizes • Many different sizes • The largest is a supergiant • Red giants are the next smallest • White dwarves are very small but Hot • Red dwarves are small but cool.

  5. Hertzsprung-Russell Diagram • This diagram shows the differences between the different types of stars.

  6. Motion • Motion can be measured in arc seconds. • In a year, a star moves 0.1 arc seconds. • In 1 year a star has moved 0.000028° • 1 arc second is 1/60th of 1°

  7. Motion (cont.) • In 1000 years, a star has moved 100 arc seconds. • Over a period of 500 000 years

  8. Famous Stars • Arcturusis a red giant and it is the brightest star on the northern side of earth. • Antares is a group of super giants with a variety of different colors.

  9. Spectroscope • Created in 1814 • Made by Dr. Fraunhofer a German optician. • It splits light by refraction. • An optician studies the human eye and helps you see better.

  10. Bibliography • http://www.astronomy.ohio-state.edu/~pogge/Ast162/Movies/proper.html • http://www.astronomy.ohio-state.edu/~pogge/Ast162/Movies/u • http://wwhttp://earthsky.org/brightest-stars/bright-orange-arcturuhttp://en.wikipedia.org/wiki/Delta_Ursae_Minoris • http://en.wikipedia.org/wiki/Delta_Ursae_Minoris • http://www.wisegeek.com/what-is-a-spectroscope.htm#did-you-know

  11. Questions • 1. What is the average temperature of a blue star? • 2. Who invented the spectroscope? • 3. How many scientists invented the Hertszprung- russelldiagram? • 4. How does a spectroscope work? • 5. Name the two dwarf stars and which is hotter than which?

  12. Answers • 20 000 to 35 000 C. • Dr. Fraunhofer Invented the spectroscope. • 2 Scientists invented the diagram. • It uses light and refracts it. • There is a red dwarf star and a white dwarf star and a white dwarf is hotter than a red dwarf.

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