Space Glossary Terms Chapter 8 Que Cards

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Space Glossary Terms Chapter 8 Que Cards
2014-01-09 21:40:42
Space Glossary Terms Chapter Que Cards

Space Glossary Terms Chapter 8 Que Cards
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  1. electromagnetic radiation
    radiation consisting of electromagnetic waves that travel at the speed of light

  2. refracting telescope
    • a telescope that uses a lens to collect the light from an object
  3. reflecting telescope
    a telescope that uses a mirror to collect light from an object

  4. satellite
    an artificial object or vehicle that orbits earth, the moon, or other celestial bodies ; also a celestial body that orbits another body of a larger size

  5. orbiters
    • observatories that orbit other celestial objects
  6. solar nebula theory
    the theory that describes how stars and planets form from contracting, spinning disks of gas and dust

  7. star
    a celestial body made of hot gases, mainly hydrogen and some helium

  8. nebula
    A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases
  9. protostar
    a hot, condensed object at the center of a nebula

  10. nuclear fusion
    the process of energy production in which hydrogen nuclei combine to form helium nuclei

  11. photosphere
    the surface layer of the sun

  12. sunspot
    an area of strong magnetic fields on the photo sphere

  13. solar wind
    a stream of fast moving charged particles ejected by the sun into the solar system

  14. solar flare
    A solar flare is a sudden brightening observed over the Sun's surface or the solar limb

  15. importance of the sun
    The sun is important because it supplies us with heat and light and is the main source of energy on our planet. The sun's gravitational pull is what holds the earth and all the other planets together

  16. luminosity
    a stars total energy output per second; its power is in joules per second (J/s)

  17. absolute magnitude
    the magnitude of a star that we would observe if the star were 32.6 light-years away from earth

  18. spectroscope
    an optical instrument that produces a spectrum from a narrow beam of light, and usually projects the spectrum onto a photographic plate or digital detector

  19. spectral lines
    certain specific wave lengths in a spectrum characterized by lines; spectral lines identify specific elements

  20. Hertzsprung-Russel diagram
    a graph that  compares the properties of stars

  21. main sequence
    a narrow band of stars on the H-R diagram that runs diagonally from the upper left to the lower right, about 90% of stars, including the sun are in the main sequence

  22. white dwarf
    a small, dim, hot star

  23. supernova
    a massive explosion in which the entire outer portion of a star is blown off

  24. neutron star
    a star so dense that only neutrons can exist in its core

  25. How low-mass stars evolve
    red dwarfs, white dwarfs, dark embers/black dwarfs, it eats its hydrogen slowly
  26. How intermediate-mass stars evolve
    consume hydrogen faster than low mass stars, core collapses, outer layers expand, red giant, white dwarf
  27. How high-mass stars evolve
    use hydrogen extremely quickly, supernova, heavier elements ejected into space
  28. black holes
    star explodes, supernova is way too powerful causing a black hole