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The map below shows stars, asteroids, and the different routes that can be taken in order to travel from Star A1 to its companion star, Star A2. If you are only allowed to travel north, northeast, or east, how many possible routes exist between the members of this binary star system?


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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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All material on this site has been created and updated between 1997-2012.

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