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Hand written #3 - Hunter Sapp 4073458 Astronomy 1...

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Hunter Sapp – 4073458 – Astronomy 1 – Wednesdays 5:00 Chapter 18, Question 9 One would look to the constellation Cassiopeia because the H II region is simply the region in which gas is ionized by young stars that emit copious amounts of ultraviolet light and thus causing the gas to become ionized. The Milky Way is a spiral galaxy and therefore when looking perpendicular one wouldn’t see the dust particles. In the dust there is large amounts of this ionized gas, mostly hydrogen, but with the spiral motion this moves the location to the arms resulting in more H II regions in Cassiopeia than Coma Berenices. Chapter 18, Question 17 Protostars are more easily seen with an infrared telescope than a visible-light telescope because the nebula only becomes heated to a few hundred Kelvin therefore the warm dust radiates thermal energy at infrared wavelengths, not visible light. Chapter 18, Question 35 At one stage during its birth, the protosun had a luminosity of 1000 L and a surface temperature of about 1000 K. At this time, what was its radius? Express your
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This note was uploaded on 08/26/2011 for the course ASTRONOMY 1 taught by Professor Staff during the Spring '11 term at UCSB.

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Hand written #3 - Hunter Sapp 4073458 Astronomy 1...

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