The Net (substance) The Net (substance) The Net, in alchemy, is an alloy of copper and iron, whose crystal structure induces a network pattern on its surface. It was described in the 17th century by Sir Isaac Newton. Newton produced the substance by following what he regarded as a recipe, encoded in classical mythology, for part of the process of achieving the philosopher's stone. The relevant myth involved the god Vulcan finding his wife Venus (alchemical symbol for copper) in bed with the god Mars (alchemical symbol for iron) Newton's interpretation rested on typical alchemical associations, construing Vulcan as a stand-in for fire,
Habitability of natural satellites film include: Earth's moon in "A Trip to the Moon" (1903); Yavin 4 from "Star Wars" (1977); Endor in "Return of the Jedi" (1983); LV-426 in "Alien" (1979) and "Aliens" (1986); Pandora in "Avatar" (2009); LV-223 in "Prometheus" (2012); and, Europa in "Europa Report" (2013). Habitability of natural satellites The habitability of natural satellites is a measure of the potential of natural satellites to have environments hospitable to life. Habitable environments do not necessarily harbor life. Planetary habitability is an emerging study which is considered important to astrobiology for several reasons, foremost being that natural satellites are predicted to greatly