Bodies orbiting the Sun most of which have luminous tail visible when near the sun. The tail always points away from the Sun. Some orbit in an Ellipse, and return at regular intervals, others orbit Parabolic which is an undefined ellipse. They usually consist of three elements: nucleus, envelope, and tail. The superstitious once considered them to be evil omens. Those pursuing an elongated orbit are periodic and return at fixed intervals. Those with a parabolic or hyperbolic orbit are expected never to return. The astrological significance of comets has been the subject of much study, but so far no definite conclusions have been reached. Suggestion has been advanced that Donate's comet, which made its first appearance of record in June 1858 and attained its maximum brilliancy on October 9th, was a factor in the nativity of Theodore Roosevelt, born October 27, 1858. It is presumed that comets presage history-making events; but operating through individuals whose birth coincides with their appearance, their effects are so delayed as often to be overlooked. Donati's comet was one of the most beautiful of comets. Its tall was curved. The nucleus had a diameter of 5,600 miles. "When beggars die there are no comets seen; The heavens themselves blaze forth the death of princes." Shakespeare. The year of F. D. Roosevelt's birth was also marked by the appearance of one of the brightest comets of record, which was visible in broad daylight - even at noon.