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"I was enabled to observe Mars every night for nearly six weeks through his [Lowell's] twenty-four inch refractor," he writes, "the last and probably the best telescope ever made by [Alvan] Clark, mounted in one of the steadiest atmospheres in the world and at an altitude above sea level of over 7,000 feet. Imagine my surprise and chagrin when I first saw the beautiful disk of Mars through this superb telescope. Not a line! Not a marking! Magnifier Engine The object I saw could only be compared in appearance to the open mouth of a crucible filled with molten gold." What a wonderful phrase: "the open mouth of a crucible filled with gold." But not a single canal, or even a line resembling a cana  It is important for non-astronomers to grasp how hard it is to see Mars in a telescope planted on Earth. This is not because of distance. Mars is at opposition to Earth every 780 days. If it is also at perihelion (meaning that it is closest to the Sun in its elliptical orbit), Mars is only 35 million miles away. Though this may seem far, it is a flea-jump in the vasty reaches of our solar system. The problem for astronomers was then and remains today distortions produced by our atmosphere.

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