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was built for him on the little island of Hveen, and he called it Uraniborg—Heavenly City—because it was devoted to the study of the heavens. Kings and nobles visited him there out of respect for the

Tycho Brahe's Observatory on the Island of Hveen.

great work he was doing: and he himself had such reverence for it that whenever he observed the stars and planets he put on his richest robes. The telescope had not yet been invented, so that his observations were made by the use of "sights" such as are used on rifles—a "back"-sight near the eye, and a