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Imagine the Universe!
Ask a High Energy Astronomer Dictionary Resources

Information from Spectra Quiz Answers

  1. A spectrum can tell us
    What elements are present in a source.
    How fast a source (such as a galaxy) is moving.
    The temperature of a source.
    All of the above.
    None of the above.

  2. X-ray and gamma ray spectra
    Can be easier to interpret than optical spectra.
    Are harder to detect than optical spectra.
    Can reveal entreme conditions of temperature, gravity and pressure.
    All of the above.
    None of the above.

Info Click here for information on the Doppler shift and how it affects a galaxy's spectrum.
Return Click here to return to using the spectrum of M31 to determine its velocity.
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