History of Solar System formation and evolution hypotheses with Uranus having a 98° tilt. The Moon being relatively large with respect to the Earth and other moons which are in irregular orbits with respect to their planet is yet another issue. It is now believed these observations are explained by events which happened after the initial formation of the Solar System. Attempts to isolate the physical source of the Sun's energy, and thus determine when and how it might ultimately run out, began in the 19th century. At that time, the prevailing scientific view on the source of the Sun's heat was that it was generated by gravitational
Battle for Terra Battle for Terra Battle for Terra, originally screened as Terra, is a 2007 American 3D computer animated action-adventure science fiction film, based on a short film of the same name about a peaceful alien planet which faces destruction from colonization by the displaced remainder of the human race. The film was directed by Aristomenis Tsirbas who conceived it as a hard-edged live action feature with photo-real Computer-Generated Imagery (CGI) environments. The close collaboration with producing partner and investor Snoot Entertainment redirected the project to become fully animated and appeal to younger audiences. The film features the voices of Evan Rachel