double star
double star
double star
dou′ble star′
n.
| Noun | 1. | double star - a system of two stars that revolve around each other under their mutual gravitation |
| 单词 | double star | |||
| 释义 | double stardouble stardouble stardou′ble star′n.
double stardouble star:see binary starbinary staror 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 starA 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]double star
Synonyms for double star
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