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Hubble's Law Quiz

  1. Traveling in your starship, you observe a distant galaxy that is 870 million light years away and is moving away from you at a speed of 20,000 km/sec. How fast would you have to travel in order to be able one day to catch up to a galaxy twice as far away?

  2. You observe three distant galaxies and note their apparent radial velocities:
    • BFG-01 39,300 km/s
    • BFG-02 79,000 km/s
    • BFG-03 19,000 km/s
    Which of the following is true about these galaxies?

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Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

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Project Leader: Dr. Barbara Mattson
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This page last updated: Monday, 30-Jan-2006 14:19:43 EST