Alien planet. Computer artwork of a scientist's vision of an alien planet called Aurelia. The planet is covered in water, land and polarcaps and appears to be very much like Earth. The planet's specific atmospheric and environmental conditions on alien planets would lead to the evolution of specific species designed to withstand these particular conditions. This depiction of this planet is based on the work of scientists from NASA, SETI (Search for Extraterrestrial Intelligence) and leading British universities.