The following story is often related in connection with the satellites of Mars: Many years before the satellites were discovered, Swift, in "Gulliver's Travels," described the little planet as having two moons, one of which flew across the Martian sky three times a day! The thing seemed absurd, for never during all the explorations of the solar system had a moon been found which behaved in such an erratic fashion. Nevertheless, in 1877. Professor Asaph Hall, of Washington, discovered two tiny attendants to the planet of the War-god weaving "like golden shuttles" around the Martian orb, and one of these made three revolutions in its orbit while the planet itself turned once on its axis! Thus the month of this surprising moon is less than eight hours long. This little rapid-transit moon flies only 3700 miles above the planet's surface, and, on account of the curvature of the globe it would not be visible beyond 69 degrees of latitude on each side of the equator. As seen from Mars, it rises in the west and sets in the east, changing from new to full one and a half times every night! With the constantly recurring metamorphoses of this tiny moon, which is scarcely 7 miles in diameter, and its most exceedingly rapid flight, it would seem that there would be some reason in naming it Phobos (Fear), after one of Mars' attendants. On account of its nearness to the surface of Mars, Phobos would appear to a Martian about the same size as our moon does to us. The other moon, which was named Deimos (Terror), is about 14 miles in diameter and is 12,500 miles from the planet. Its period is also very short, being only 30 hours and 18 minutes. Since this period is only a few hours more than the rotation period of Mars, the moon moves very slowly across the sky, remaining continuously above the horizon of any given place on the planet for more than 60 hours. It has been computed that these two small moons would cause 1400 eclipses of the sun a year, as seen from Mars. They are the smallest objects visible in the sky, as seen from earth. Our month of March, as well as this fiery-hued planet, was named after the War-god. Since Tuesday was also named after the War-god, it might be well to mention here how the other days and months obtained their names.