Planet smallest known planet is PSR B1257+12A, one of the first extrasolar planets discovered, which was found in 1992 in orbit around a pulsar. Its mass is roughly half that of the planet Mercury. The smallest known planet orbiting a main-sequence star other than the Sun is Kepler-37b, with a mass (and radius) slightly higher than that of the Moon. Every planet began its existence in an entirely fluid state; in early formation, the denser, heavier materials sank to the centre, leaving the lighter materials near the surface. Each therefore has a differentiated interior consisting of a dense planetary core surrounded
Arrow to the Sun Arrow to the Sun Arrow to the Sun is a 1973 short film and a 1974 book, both by Gerald McDermott. The book was printed in gouache and ink, and won the 1975 Caldecott Medal for illustration. Both media are a retelling of a Pueblo tale, specifically an Acoma Pueblo tale, in which a mysterious boy seeks his father. The Boy (who does not have a name) is the son of the Sun lord, who sends the spark of life into a maiden of the Pueblo. He is ridiculed by the other boys because he has no father. The Boy