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First Contact (book)
First contact may refer to: *First contact (astronomy), the moment in astronomical transit when the apparent positions of the two bodies first touch *First contact (anthropology), the first meeting of two cultures previously unaware of one another * First contact (science fiction), a common science fiction theme about the first meeting between humans and extraterrestrial life Media Film *'' Star Trek: First Contact'', a 1996 film in the ''Star Trek'' science fiction franchise * ''First Contact'' (1983 film), a 1983 documentary by Bob Connolly and Robin Anderson *'' Ultraman Cosmos: The First Contact'', a 2001 theatrical film adaptation of the ''Ultraman Cosmos'' TV series Television * ''First Contact'' (Australian TV series), a 2014 Australian television documentary *First Contact (Canadian TV series), a 2018 Canadian documentary television series TV episodes * "First Contact" (''Star Trek: The Next Generation''), a 1991 episode of the science fiction television series ''Star Trek ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
First Contact (astronomy)
In astronomy, a transit (or astronomical transit) is a phenomenon when a celestial body passes directly between a larger body and the observer. As viewed from a particular vantage point, the transiting body appears to move across the face of the larger body, covering a small portion of it. The word "transit" refers to cases where the nearer object appears smaller than the more distant object. Cases where the nearer object appears larger and completely hides the more distant object are known as ''occultations''. However, the probability of seeing a transiting planet is low because it is dependent on the alignment of the three objects in a nearly perfectly straight line. Many parameters of a planet and its parent star can be determined based on the transit. In the Solar System One example of a transit involves the motion of a planet between a terrestrial observer and the Sun. This can happen only with inferior planets, namely Mercury and Venus (see transit of Mercury and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
