extraterrestrial target
11Stars and planetary systems in fiction — The planetary systems of stars other than the Sun and the Solar System are a staple element in much science fiction. Contents 1 Overview 1.1 The brightest stars …
12Self-replicating spacecraft — The idea of self replicating spacecraft has been applied in theory to several distinct tasks . The particular variant of this idea applied to the idea of space exploration is known as a von Neumann probe. Other variants include the Berserker and… …
13Fermi paradox — The Fermi paradox is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilizations and the lack of evidence for, or contact with, such civilizations.The extreme age of the universe and its …
14Dalek — This article is about the fictional species. For the 1963 serial, see The Daleks. For the 2005 episode, see Dalek (Doctor Who episode). For other uses, see Dalek (disambiguation). Doctor Who alien …
15History of Raëlism — Raëlian Messages on van A series of articles on the Raëlian Movement …
16Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
17Hayabusa — This article is about the spacecraft. For other uses, see Hayabusa (disambiguation). Hayabusa A computer rendering of Hayabusa above Itokawa s surface Operator …
18Impact crater — The prominent impact crater Tycho on the Moon. In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body. In most common usage,… …
19Natural satellite habitability — Artist s impression of a hypothetical habitable moon of Upsilon Andromedae d Natural satellite habitability is the measure of a natural satellite s potential to sustain life. The study of natural satellite habitability is important to… …
20Carl Sagan — Sagan in 1980 Born November 9, 1934( …
