• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/30

Click to flip

30 Cards in this Set

  • Front
  • Back
Define spectrum
the band of color produced when light passes through a prism
Define apparent magnitude
the brightness of a star as seen from Earth
Define absolute magnitude
The brightness that a star would have at a distance of 32.6 light-years from Earth
Define light-year
the distance that light travels in one year; about 9.5 trillion years
Define parallax
an apparent shift in the position of an object when viewed from different locations
Define red giant
a large reddish star late in its life cycle
Define white dwarf
a small, hot, dim star that is the leftover center of an old star
Define H-R diagram
Hertzsprung-Russell diagram, a graph that shows the relationship between a star's surface temperature and absolute magnitude
Define main sequence
the location on the H-R diagram where most stars lie
Define supernova
a gigantic explosion in which a massive star collapses and throws its outer layers into space
Define spectrum
the band of color produced when light passes through a prism
Define apparent magnitude
the brightness of a star as seen from Earth
Define absolute magnitude
The brightness that a star would have at a distance of 32.6 light-years from Earth
Define light-year
the distance that light travels in one year; about 9.5 trillion years
Define parallax
an apparent shift in the position of an object when viewed from different locations
Define red giant
a large reddish star late in its life cycle
Define white dwarf
a small, hot, dim star that is the leftover center of an old star
Define H-R diagram
Hertzsprung-Russell diagram, a graph that shows the relationship between a star's surface temperature and absolute magnitude
Define main sequence
the location on the H-R diagram where most stars lie
Define supernova
a gigantic explosion in which a massive star collapses and throws its outer layers into space
Define neutron star
a star that has collapsed under gravity to the point that the electrons and theprotons have smashed together to form neutrons.
Define pulsar
a rapidly spinning neutron star that emits rapid pulses of radio and optical energy
Define black hole
an object so massive and dense that even light cannot escape its gravity
Define galaxy
a collection of stars, dust and gas bound together by gravity
Define nebula
a large cloud of dust and gas in interstallar space; a region in space where stars are born or where stars explode at the end of their lives.
Define globular cluster
a tight group of stars that looks like a ball and contains up to 1 million stars
Define open cluster
a group of stars that are close together relative to surrounding stars
Define quasar
a very luminous, starlike object that generates energy at a high rate; quasars are thought to be the most distant objects in the universe
Define cosmology
the study of the origin, properties, processes and evolution of the universe
Define the Big Bang Theory
the theory that states the universe began with a tremendous explosion 13.7 billion years ago