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The Hidden Lives of Galaxies - Evidence for Hidden Mass

Activity #6a - Evidence for Hidden Mass


  1. Student will be able to interpret and analyze the information in the data presented on the "Evidence for Hidden Mass" graph.
  2. Student will be able to determine why the data looks the way it does on the graph.
  3. Student will be able to observe trends to determine if there is a pattern to the way the data is shown.


  1. Finish writing the paragraph by interpreting the data about Solar System planets on the "Evidence for Hidden Mass" graph on the "Hidden Lives of Galaxies". (See Transparency #6: Evidence for Hidden Mass,

    There are ________ solar system planets presented on the graph. The planets, from the closest to the Sun to the furthest from the Sun, are ________________________________________________________________________________ _________________________________________________________.

    Using the graph, the velocities of the solar system planets, from the lowest value to the highest value, are _________________________________________________________________________________ __________________________________________________________.

    Using the graph, the distances of the planets from the Sun are, from least to greatest, __________________________________________________________________ ___________________________________________________________.

    In general, the further the planet is away from the Sun the ________________its velocity. The closer the planet is to the Sun the __________________its velocity.

  2. Write a paragraph interpreting the data for Galaxy F563-1. Include information about distance from the center, velocity, and trends.

    ________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ___________________________________________________________________________________ ________________


A service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/GSFC

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