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Lecture 21

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Department
Origins
Course
ORIGINS 2B03
Professor
Laura Parker
Semester
Fall

Description
Lecture 21Tuesday November 01 20111230 PMGiantsLumWhite dwarftemperatureThe interstellar medium is mostly gas and dust low densityDust makes up 1 Of the stuff between stars can lock starlightWe can directly see light in the interstellar mediumSpecial places in the IN are dense and quite cool where stars are formed called molecular cloudsThey have molecules in them in the rest of the IM there are only atomsThe youngest stars are formed in the deepest coolest part inside the molecular cloudThe most massive star we cannot even see being form as they die out so quicklyIt is hard to see star formation Infrared is used to see throughGravity amplifies density like if you have some denser regions gravity will make them dense over timeThe densest region where stars are found are called cores which is only a few degrees higher than 0 degrees Celsius ASTRON 2B03 Page 1
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