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24 Cards in this Set
- Front
- Back
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stage stars spend most of their life
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MAIN SEQUENCE
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the balance between the outward press of heat and inward push of gravity
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HYDROSTATIC EQUILIBRIUM
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leads to stability in main sequence
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HYDROSTATIC EQUILIBRIUM
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what causes a star to move out of main sequence
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RUNS OUT OF HYDROGEN IN CORE
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requirement to do helium fusion
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EVEN HOTTER TEMPERATURES
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fusion patterns post-main sequence
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HYDROGEN BURNING IN SHELL
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what happens to temperature as a star first leaves main sequence
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DROPS SLIGHTLY
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what happens to luminosity as a star first leaves main sequence
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INCREASES
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two reasons why luminosity may increases
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INCREASE TEMPERATURE OR SIZE
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stage indicated by substantial increase in size and luminosity, but cool in temperature
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RED GIANT
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fusion patterns near the end of red giant stage
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HELIUM FUSION
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2 He fust to yield...
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Be (BERYLLIUM)
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Be + He fuse to yield...
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C (CARBON)
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another name for He-4 nuclei
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ALPHA PARTICLES
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a rapid rise in temperature as nuclear reactions are temporarily out of control in core
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HELIUM FLASH
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result of the helium flash
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REDUCTION IN ENERGY OUTPUT, CORE COOLS, SLIGHT DECREASE IN LUMINOSITY
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what is required for oxygen to be formed in the core?
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C + He and EXTREME COMPRESSION
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primary component of central core of a planetary nebula
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CARBON
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ionizing radiation from hot star embedded in cool gas
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PLANETARY NEBULA
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fate of a low mass star
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BLACK DWARF
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dying stage of a low mass star, small with high temperature
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WHITE DWARF
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cold, dense, dead star
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BLACK DWARF
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star that never undergoes nuclear fusion
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BROWN DWARF
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mass of a brown dwarf
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0.08 SOLAR MASS
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