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