Astronomy Class Notes November 16

Astronomy Class Notes November 16 - Jerry Imel Astronomy...

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Jerry Imel Astronomy Notes 11/16/2010 Star Clusters 1. Open a. Hundreds of Stars; Disperses; Found in Disk of the Milky Way 2. Globular a. Millions of Stars; Remain together; Found in Halo of Milky Way EXAM QUESTION 5 Diagrams…Indicate the youngest or oldest “globular cluster”? Youngest is missing the bottom part, and the oldest is missing more and more of the upper part HINT – Graph Star App. Mag N M Spectrum 1 12 G, Main Sequence 2 8 K, Giant 3 12 K, Main Sequence 4 15 O, Main Sequence 5 5 M, Main Sequence Which of the 5 stars is the hottest? 4, because of type O (left, farther left = hotter) Coolest = 5, because of M (right, farther right = coolest) Most Luminous = 4, because O is higher Least Luminous = 5, b/c M is lower Which Main Sequence star has the most mass? 4 Which has the smallest diameter? 5, (White Dwarf is even smaller) Largest in Size (diameter) = 2, b/c it’s the Giant Which is the nearest to Earth? 5, b/c dimmest on list and brightest in sky Which is the farthest from Earth? 4, b/c O (BRIGHTEST, but shows up as dim)
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This note was uploaded on 10/09/2011 for the course ASTRO 47280 taught by Professor Islam during the Spring '09 term at Ball State.

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Astronomy Class Notes November 16 - Jerry Imel Astronomy...

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