astrophysics study guide

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chapter 12
what dust is emitted into to create galaxies
interstellar medium
giant molecular clouds which are cool and dense collapse into
cluster of stars
if temp reaches 10,000,000K what happens
nuclear fusion into a protostar
high mass stars have higher luminosity than low mass stars (t or f)
chapter 13
read full summary to understand process of white dwarf. draw it out
Chapter 14
MS stars are in their ______ life stage
longest (90%)
luminosity ratio of ms
mass measures amount of fuel
luminosity measures the rate its burned
indicator of cluster’s age
turnoff point
older clusters have turn off points further ______ the MS
oldest clusters that are 12 billion years
Chapter 15
brighter cepheids
longer periods of light variation
milky way spirals on outside
island galaxies
center of our universe
milky way size
300000 lightyears
who believed nebulae were island galaxies
modern view of the universe launch
before 1925 what were astronomers stuck on
milky way was entire universe finite and static
slipher’s discovery
most galaxies are moving away from us
chapter 17
using 100 inch telescope what did Hubble discover
cepheids in nearby spiral galaxies, including andromeda
how can we estimate the distance of a cepheid
light variation
stars > 8 solar masses
become supernovas (blackholes)
stars < 8 solar masses
become white dwarfs
Categories: Astrophysics