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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

Stars Part 2

By: Damian Draayers

And Pasha Sekhon

you will learn
You Will Learn…

• Color and temperature

• Size

• Hertzsprung-Russell Diagram

• Motion

• Arc second

• Famous Stars

• Spectroscopes

color and temperature
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
sizes
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.
hertzsprung russell diagram
Hertzsprung-Russell Diagram
  • This diagram shows the differences between the different types of stars.
motion
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°
motion cont
Motion (cont.)
  • In 1000 years, a star has moved 100 arc seconds.
  • Over a period of 500 000 years
famous stars
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.
spectroscope
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.

bibliography
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
questions
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?
answers
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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