Tracking Jupiter Moons

Original Title:

    Tracking Jupiter Moons


        jupiter moons galileo mass


          Galileo discovered the four largest moons of Jupiter in 1610, and
          they are often referred to as the Galilean Moons. He was using a simple
          telescope and a keen mind. It is a testimony to his observational prowess
          that out of all the stars and bright objects he could see in the sky, he
          noticed that Jupiter and these four dimmer lights, which he assumed
          were stars, were stretched out along
          a straight line. When he looked again
          he saw that the positions had changed
          from one night to the next, which is
          not what stars do. After repeated
          observations he determined that they
          were moons orbiting around Jupiter.

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