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Stars Part 2By: Damian DraayersAnd Pasha SekhonYou Will LearnColor and temperatureSizeHertzsprung-Russell Diagram MotionArc secondFamous StarsSpectroscopes

The Color and the temperature of some of the different stars and also the sizes of them.2Color and TemperatureLots of different temperaturesRed stars are coldest, 3000CYellow stars are moderate, 6000C (Sun)Blue stars are the hottest, 20 000C to 35 000C

SizesMany different sizesThe largest is a supergiantRed giants are the next smallestWhite dwarves are very small but HotRed dwarves are small but cool.

Hertzsprung-Russell DiagramThis diagram shows the differences between the different types of stars.

MotionMotion can be measured in arc seconds.In a year, a star moves 0.1 arc seconds.In 1 year a star has moved 0.0000281 arc second is 1/60th of 1

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

Famous StarsArcturus is 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.

SpectroscopeCreated in 1814Made by Dr. Fraunhofer a German optician.It splits light by refraction.An optician studies the humaneye and helps you see better.

Bibliographyhttp://www.astronomy.ohio-state.edu/~pogge/Ast162/Movies/proper.htmlhttp://www.astronomy.ohio-state.edu/~pogge/Ast162/Movies/uhttp://wwhttp://earthsky.org/brightest-stars/bright-orange-arcturuhttp://en.wikipedia.org/wiki/Delta_Ursae_Minorishttp://en.wikipedia.org/wiki/Delta_Ursae_Minorishttp://www.wisegeek.com/what-is-a-spectroscope.htm#did-you-know

10Questions1.What is the average temperature of a blue star?2.Who invented the spectroscope?3.How many scientists invented the Hertszprung-russell diagram?4.How does a spectroscope work?5.Name the two dwarf stars and which is hotter than which?

Answers20 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.