Vulcan (hypothetical planet) Vulcan (hypothetical planet) Vulcan is a small hypothetical planet that was proposed to exist in an orbit between Mercury and the Sun. Attempting to explain peculiarities of Mercury's orbit, the 19th-century French mathematician Urbain Le Verrier hypothesized that they were the result of another planet, which he named "Vulcan". A number of reputable investigators became involved in the search for Vulcan, and despite occasional claimed observations, no such planet was ever confirmed. Peculiarities in Mercury's orbit have now been explained by Albert Einstein's theory of general relativity. Searches of data gathered by NASA's two "STEREO" spacecraft have failed to find
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