double star


Also found in: Dictionary, Thesaurus, Wikipedia.
Related to double star: Optical double star

double star:

see binary starbinary star
or binary system,
pair of stars that are held together by their mutual gravitational attraction and revolve about their common center of mass. In 1650 Riccioli made the first binary system discovery, that of the middle star in the Big Dipper's handle, Zeta
..... Click the link for more information.
.

double star

A pair of stars that appear close together in the sky. There are two types: optical double stars and physical double stars. Stars in an optical double, such as Deneb, appear close only because they happen to lie in very nearly the same direction from Earth; they are actually too far apart to be members of a dynamically linked system. Stars in a physical double are sufficiently close together for their motions to be affected by their mutual gravitational attraction. They are more usually known as visual binaries.

double star

[¦dəb·əl ′stär]
(astronomy)
A star which appears as a single point of light to the eye but which can be resolved into two points by a telescope.
References in periodicals archive ?
The tracking feature was then re-enabled and the process was repeated five times for each double star and the resulting position angles were averaged.
Visual double stars are among the easiest of all astronomical objects to observe.
A total occultation report was submitted to Jan Manek (IOTA occultations regional coordinator for Europe) and a double star report to Brian Loader (IOTA double star coordinator).
If you combine a Double Star lower receiver with a J&T upper, the gun will look just like a Double Star gun, since Double Star guns are built with J&T components.
The lovely double star iota Pictoris is situated in the far western part of the constellation, which could be seen as representing the steady stay of the painter's drawing board, barely 30' west of the galaxy NGC 1705.
This difference in speed could imply that VFTS 102 is a runaway star -- a star that has been ejected from a double star system after its companion exploded as a supernova.
Double stars are not greatly affected by the bright summer skies, and it is a good time to search out some of the classic doubles.
Magda Streicher has set up and calibrated the Meade Astrometric eyepiece on the 400mm SCT and has started a formal programme of double star measurement, concentrating on one constellation at a time.
The joint effort of amateur astronomers and scientists led to the first reported case of a planet orbiting a double star.
com Champion Hurdle, Double Star has a plot draw outside poorly berthed Sizzlers Spirit, who does his best work against the rails.
Mr Abdul Ahad, in his letter in the December Journal (120(6), 374 (2010)) described his search, conducted bibliographically, for the double star with the greatest colour contrast.
The modern definition of a double star may be credited to William Herschel, who published two double star catalogues with a total of about 700 objects in 1782 and 1785.