physical double star.
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physical double star — noun also physical double : binary star compare optical double star … Useful english dictionary
physical double star. — See under double star … Useful english dictionary
double star — Astron. two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star), or those… … Universalium
physical double — noun see physical double star … Useful english dictionary
Double Star mission — Double Star is a joint satellite based space mission by the China National Space Administration (CNSA) and the European Space Agency (ESA). It is the first space mission launched by China to investigate Earth s magnetosphere. It consists of two… … Wikipedia
optical double star — noun also optical double or optical pair : double star 2 compare physical double star … Useful english dictionary
Double star — For other uses, see Double star (disambiguation). In observational astronomy, a double star is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope. This can happen either because… … Wikipedia
double star — /ˈdʌbəl sta/ (say dubuhl stah) noun two stars so near to each other in the sky that they appear as one under certain conditions; optical double stars are two stars at greatly different distances but nearly in line with each other and the… …
De Sitter double star experiment — This article is about observing binary stars. For precession of orbiting bodies, see de Sitter precession. de Sitter s double star argument The de Sitter effect was described by de Sitter in 1913 and used to support the special theory of… … Wikipedia
Star system — This article is about stars in outer space. For the Hollywood star system, see Star system (film). For a system of planets around a star, see Planetary system. A star system or stellar system is a small number of stars which orbit each other,[1]… … Wikipedia
