Astronomy Chapter 7

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Author:
eboustead
ID:
148249
Filename:
Astronomy Chapter 7
Updated:
2012-04-17 20:04:31
Tags:
ASTR 205
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Description:
The Sun- key terms and concepts
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  1. sunspot
    relatively dark spots on the sun that contain intense magnetic fields
  2. granulation
    the fine structure of bright grains covering the sun's surface
  3. convention
    circulation in a fluid driven by heat
  4. supergranules
    very large convective features in the sun's surface
  5. filtergram
    a photograph (usually of the sun) taken in the light of a specific region of the spectrum
  6. spicules
    small, flamelike projections in the chromosphere of the sun
  7. coronagraphs
    specialized teleschope that block the light of the photosphere and record the corona
  8. magnetic carpet
    the network of small magnetic loops that covers the solar surface
  9. solar winds
    rapidly moving atoms and ions that escape from the solar corona and blow outward through the solar system
  10. helioseismology
    the study of the interior of the sun by the analysis of its modes of vibration
  11. weak force
    one of the four forces of nature; binds protons and neutrons together in atomic nuclei
  12. strong force
    one of the four forces of nature
  13. nuclear fission
    reaction that break the nuclei of atoms into fragements
  14. nuclear fushion
    reactions that joing the nuclei of atoms to form more massive nuclei
  15. Proton-Proton chain
    p-p chain
    a series of three nuclear reactions that builds a helium atom by addind together protons
  16. deuterium
    an isotope of hydrogen in which the nucleus contains on proton and one neutron
  17. positron
    a subatomic particle that has a positive chare; having the same mass and magnitude of charge as the electron and consitution the antiparticle of the electron, which is also called anantielectron
  18. Neutrino
    a neutral atomic particle that travels at or nearly at the speed of light
  19. coulomb barrier
    the electrostatic force of repulsion between bodies of like change
  20. radiactive zone
    carriers evergy outward in the form of radiation from the core of the sun, and extends up to about 0.7 radii
  21. convection zone
    carriers energy outward as circulating gas found between the radiative zone and the atmosphere of the sun
  22. dynamo effectq
    the process by which a rotating, convecting body of conducting matter can generate a magnetic field
  23. differential rotation
    the rotationg of a body in which different parts of the body have different periods of rotation
  24. Babock model
    a model of the sun's magnetic cycle in which the differential rotationg of the sun winds up and tangles the solar magnetic field in a 22 year cycle
  25. Zeeman effect
    the splitting of spectral lines into multiple componenets when the atoms are in a magnetic field.
  26. active regions
    magnetic regions on the solar surface that include sunspots, prominences, flares, and similar features
  27. prominence
    a looping eruption on the solar surface
  28. filaments
    solar prominences seen from above silhouetted again bright photosphere
  29. coronal holes
    areas of the solar surface that are dark at X-ray wavelengths; may be the source of solar wind
  30. auroras
    the glowing light displays that result when a planet's magnetic field guides charged particles so that they strike the upper atmosphere and excite atoms to emit photons

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