In his account of Gulliver's voyage to the imaginary island of Laputa, Swift says the Laputans " have discovered two lesser stars, or satellites, which revolve around Mars; whereof the innermost is distant from the center of the primary planet exactly three of his diameters, and the outermost five; the former revolves in the space of 10 hours ( actually about 7 and a half hours ), and the latter in 21 and a half ( about 30 hours ) ."
12.
In his account of Gulliver's voyage to the imaginary island of Laputa, Swift says the Laputans " have discovered two lesser stars, or satellites, which revolve around Mars; whereof the innermost is distant from the center of the primary planet exactly three of his diameters, and the outermost five; the former revolves in the space of 10 hours ( actually about 7 and a half hours ), and the latter in 21 1 / 2 ( about 30 hours ) ."
13.
In his account of Gulliver's voyage to the imaginary island of Laputa, Swift says the Laputans " have discovered two lesser stars, or satellites, which revolve around Mars; whereof the innermost is distant from the center of the primary planet exactly three of his diameters, and the outermost five; the former revolves in the space of 10 hours ( actually about 7 and er Asaph Hall turned his telescope on Mars, and, lo and behold, there were two moonlets, just as Swift envisioned them.
