Science Chapter 8 II

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Science Chapter 8 II
2014-01-16 21:06:20

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  1. Hertzsprung-Russell diagram

    A graph of the absolute magnitude of stars plotted against their surface temperature or color, used in the study of stellar evolution.

  2. Main sequence
    A major grouping of stars that forms a relatively narrow band from the upper left to the lower right when plotted according to luminosity and surface temperature on the Hertzsprung-Russell diagram.
  3. White dwarf
    The remnant of a star that has collapsed, having an extremely dense state with no empty space between its atoms, but not reaching the extremely dense state of a neutron star or black hole.

  4. Supernova
    A rare celestial phenomenon involving the explosion of most of the material in a star, resulting in an extremely bright, short-lived object that emits vast amounts of energy.

  5. Neutron star
    A celestial body consisting of the superdense remains of a massive star that has collapsed with sufficient force to push all of its electrons into the nuclei that they orbit, thus leaving only neutrons, and having a powerful gravitational attraction from which only neutrinos and high-energy photons can escape, rendering the body detectable only by x-ray.
  6. How low-mass stars evolve
    Protostar, red dwarf, white dwarf, black dwarf

  7. How intermediate-mass stars evolve
    • Protostar, intermediate-mass star, red giant, white dwarf

  8. How high-mass stars evolve
    Protostar, high-mass star, supergiant, supernova
  9. Black hole
    a region of space having a gravitational field so intense that no matter or radiation can escape.