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Imagine the Universe!
Ask a High Energy Astronomer Dictionary Resources

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?

Home Imagine Science Special Exhibit Satellites and Data
Dictionary Resources Teachers' Corner Ask a High Energy Astronomer

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