In the month of March, in Seventeen Hundred Ninety-one, Herschel, by the discovery of Uranus, found his place as a fixed star among the world's great astronomers. Years before this, William and Caroline had figured it out that there must be another planet in our system in order to account plausibly for the peculiar ellipses of the others. That is to say, they felt the influence of this seventh planet; its attractive force was realized, but where it was they could not tell. Its discovery by Herschel was quite accidental. He was sweeping the heavens for comets when this star came within his vision. Others had seen it, too, but had classified it as "a vagrant fixed star." It was the work of Herschel to discover that it was not a fixed star, but had a defined and distinct orbit that could be calculated. To look up at the heavens and pick out a star that could only be seen with a telescope--pick it out of millions and ascertain its movement--seems like finding the proverbial needle in a haystack. The present method of finding asteroids and comets by means of photography is simple and easy. The plate is exposed in a frame that moves by clockwork with the earth, so as to keep the same field of stars steady on the glass. After two, three or four hours' exposure, the photograph will show the fixed stars, but the planets, asteroids and comets will reveal themselves as a white streak of light, showing plainly where the sitters moved. Herschel had to watch each particular star in person, whereas the photographic lens will watch a thousand. How close and persistent an observer a man must be who, watching one star at a time, discovers the one in a million that moves, is apparent. Chance, surely, must also come to his aid and rescue if he succeeds. Herschel found his moving star, and at first mistook it for a comet. Later, he and Caroline were agreed that it was in very truth their long-looked-for planet. There are no proprietary rights in newly discovered worlds--the reward is in the honor of the discovery, just as the best recompense for a good deed lies in having done it. The Royal Society was the recording station, as Kiel, Greenwich and Harvard are now. Herschel made haste to get his new world on record through his kind neighbor, Doctor Watson. The Royal Society gave out the information, and soon various other telescopes corroborated the discovery made by the Bath musician. Herschel christened his new discovery "Georgium Sidus," in honor of the King; but the star belonged as much to Germany and France as to England, and astronomers abroad scouted the idea of peppering the heavens with the names of nobodies. Several astronomers suggested the name "Herschel," if the discoverer would consent, but this he would not do. Doctor Bode then named the new star "Uranus," and Uranus it is, although perhaps with any other name 't would shine as bright.