Dukug Sulcus. Adapa. Lagamal. Wepwawet. Humbaba. They sound like names of places in a lost installment of "Firefly," but they're real. Yes, they're 390,400,000 miles away, but real nonetheless.
These geological features are found on Ganymede, one of Jupiter's gigantic moons. They're detailed in a new map published by the U.S. Geological Survey from a team of scientists led by Wes Patterson of the Johns Hopkins Applied Physics Laboratory and Geoffrey Collins of Wheaton College. The map can be downloaded here and measures a generous 58x41 inches. … Read more