extraterrestrial flight
11Unidentified flying object — UFO redirects here. For other uses, see UFO (disambiguation). Photograph of alleged UFO, New Jersey, July 31, 1952 A term originally coined by …
12Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
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 …
14List of characters in Astro City — The world of Astro City has numerous heroes and villains in the cast, as well as normal, everyday civilians along with other, stranger entities. It is a rich, well textured array of characters, influenced from a broad spectrum of history, myths,… …
15space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
16Area 51 — This article is about the U.S. Air Force installation in Nevada. For other uses, see Area 51 (disambiguation). Area 51 …
17List of space agencies — This is a list of government agencies engaged in activities related to outer space and space exploration. The name given is the English version, with the native language version below. The acronym given is the most common acronym: this can either …
18Stars 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 …
19Riley Martin — Born May 9, 1946 (1946 05 09) (age 65) Mississippi Occupation Author, Radio personality Website …
20Earth 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… …
