Word: systemae
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Half a century passed before Galileo's question was answered. In a 1659 treatise, Systema Saturnium. Dutch Astronomer Christiaan Huygens correctly deduced the the ears of Saturn were a distinct ring, disconnected from the parent planet and slightly tilted as observed from the earth. From a terrestrial perspective the ears would periodically vanish because the angle of vision changed during Saturn's voyage around the sun. A superb telescope-maker, Huygens also discovered Saturn's largest moon, Titan, and calculated the time it took the ringed planet Huygens make a single journey around the sun (nearly...
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