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19 Cards in this Set

  • Front
  • Back
Absolute Magnitude
a measure of the light actually given off by a star or celestial object
Apparent Magnitude
the measure of the light that reaches Eath from a star or celestial object
Big Bang Theory
the theory for the formation fo the universe which posits that the universe formed as it expanded out of a massive explosionn over 15 billion years ago
binary system
system in which two stars orbit each other
black hole
final remnant of some massive stars
middle layer of the sun's atmosphere located between the corona and photosphere
a star grouping usually named after a mythological character, animal or other common object it resembles
largest outermost atmospheric layer of the sun
massive celestial grouping of gas, stars, and dust bound together by gravity...usually elliptical spiral or irregular in shape
late stage in life cycle of a star when hydrogen in the star's core grows hotter and contracts, forcing the expansion of the star's outer layers
light year
unit of measurement based on the distance light can travel in a single year
aprx 9.5 killion km
main sequence
diagonal band found on the Hertzsprung Russell diagram that incudes 90 percent of all known starts...demonstrates relationship between color bightness and temperature of a star
large dust and gas cloud found in space that could be the beginnings of a star
neutron star
last stage in a star's life cycle when a supernova's core collapses to about 10-15 km and becomes so dense that only neutrons are able to exist inside
an object's appareent shift in position when looked at from two different points
the sun's inner atmospheric layer which radiates the sun's visible light
dark area on the surface of the sun visible because it's cooler than the surrounding areas...caused by strong magnetic field of the sun
super giant
late staage in a star's life cycle when the termperature of a star's core increased dramatically, heavy elements are formed by fusion and the outer layers of the stars expand
white dwarf
late stage in a star's life when the heliumfuel core of a star is exhausted ant the unstable outer layers of the star travel out into space leaving only a white-hot, dense core behind