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 ?
Look for the 7.3-magnitude primary of double star STF 131 in the northwest region of the cluster.
Journal of Double Star Observations, Spring 2008, , 3(2),p.59-65.
Additional Clusters and Double Stars in and near Auriga Object RA Dec.
The Washington Double Star Catalogue lists the star as having 2 components, with magnitudes of 7.4 and 7.9 at a separation of 0.36 arcseconds (epoch 2011.8).
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.
We now know that this pair is not a true double star, but an optical double.
This one is a wide double star with enough difference in brightness between its components (magnitudes 2.5 and 8.7) to play a neat trick on your eye.
On Tuesday, the banks decided not to accept Double Star's demand that they slash the sales price by 16.2 percent to 800 billion won ($710 million).
The Johannesburg Centre of ASSA is in the process of renovating the cardex archive of double star measurements going back to 1835.
Given that three of the first five home all raced close to the pace, that was probably a better effort from Double Star than it appeared at first glance.
Washington, Dec 8 (ANI): Best visuals of a double star system have been captured for the first time, in which the cooler and larger of the two has lost most of its material to its 'vampire' companion, a new study has revealed.