Astro Final

  1. Apparent Magnitude
    How bright an object looks from Earth
  2. Luminosity
    Light output of an object
  3. Metric system, English system examples
    (nano, micro, milli, centi, deci, -meter, deca, hecto, kilo, mega, giga) Miles, Kilometers,
  4. what are measurements used to measure distance in the solar system, Milky Way, and astronomy in general
    Light years, Astronomical units. etc.
  5. what is 10 to the 4th and what is 10 to the negative 4th
    100000- .0010
  6. what does the H-R diagram measure
    Intrinsic Brightness, Faintness, Size, Temperature, absolute magnitude
  7. what temp and and absolute magnitude is the sun
    G-2, 4.83
  8. size of the milky way
    30-40 kiloparsecs, or 100,000 lightyears.
  9. Meteoroid, meteor, meteorite.
    meteriod is in space, meteor, is entering the atmosphere, meteorite is a rock on our ground
  10. diameter of the sun compared to earth
    109 earth diameters
  11. mass of the sun compared to earth
    332,943 earth masses
  12. interior of sun has how many zones? and what are they
    3 zones, core, radiation, convection
  13. what produces the suns energy, (how does the sun work with the energy)
    the Core then the radiation has it carried outward by photons, and the convection zone has energy carried outward by mass motion convection.
  14. the sun has an atmosphere with how many layers? what are they
    photosphere temp is 5,750K, chromosphere temp is 100,000K , Corona is 1-2 x10 ot the 6th K
  15. sunspots
    long term features (few weeks) cooler regions in the photosphere
  16. granules
    short term features columns of gases moving in photospere bright: blue-shifted; dark; red-shifted
  17. faculae
    bright, hot gases located near sunspots
  18. how long is a solar cycle
    11 year period(butterfly pattern), 22 year period(magnetic field of sun flips)
  19. Solar Wind
    general expulsion of material from the Sun, in the form of highly charged particles, made of ionized Hydrogen, protons and electrons.
  20. what are most things on the sun controlled by?
    magnetic activity of the Sun
  21. what is the inward force(s) of the sun
  22. what are the outward forces of the sun?
    Gas pressure, radiation pressure
  23. why doesnt the sun blow itself apart? and what is it called
    because inward forces balance outward forces, Hydrostatic equilibrium
  24. Energy produced=luminosity
    thermal equilibrium
  25. what creates sunspots
    magnetic activity
  26. energy sources (sun)
    Combustion-fossil fuel, Contraction- conversion of gravitational potential energy to kinetic energy to thermal energy
  27. Thermal Energy
    Total random, microscopic, kinetic Energy of particles in a substance
  28. Temperature
    Celcius, Farenhieght, Kelvin, Average random, microscopic K.E. of the particles in a substance
  29. properties measured of stars are?
    Luminosity, size, temperature, Mass
  30. most direct method of determining stellar distances is to use the-----
    Parallax technique
  31. what is a Parsec
    distance measurement, 1pc= 3.26 light years, 1pc= 206,265 AUs
  32. what are the two things that determine the apparent magnitude of a star(don't think complicated)
    Luminosity and distance
  33. absolute magnitude
    brightness of a star seen from 10 Parsecs
  34. Type (_)'s of stars
    O B A F G K M
  35. what 95% of stars can be found on the ____________ and they are mostly________
    Main sequence, Dwarf stars
Card Set
Astro Final
Astro Final