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Carina

(Encyclopedia)Carina kərēˈnə [key] [Lat.,=the keel], southern constellation, representing the keel of the ancient constellation Argo Navis, or Ship of the Argonauts. Carina contains Canopus, the second brightes...

Rigel

(Encyclopedia)Rigel rīˈjəl [key], bright star in the constellation Orion; Bayer designation Beta Orionis; 1992 position R.A. 5h14.2m, Dec. −8°13′. A huge, blue supergiant of spectral class B8 Ia, Rigel has ...

Polaris

(Encyclopedia)Polaris pōlârˈĭs [key] or North Star, star nearest the north celestial pole (see equatorial coordinate system). It is in the constellation Ursa Minor (see Ursa Major and Ursa Minor; Bayer designat...

planetary system

(Encyclopedia)planetary system, a star and all the celestial bodies bound to it by gravity, especially planets and their natural satellites. Until the last decade of the 20th cent., the only planetary system known ...

radial velocity

(Encyclopedia)radial velocity, in astronomy, the speed with which a star moves toward or away from the sun. It is determined from the red or blue shift in the star's spectrum. ...

Auriga

(Encyclopedia)Auriga ôrīˈgə [key] [Lat.,=the charioteer or wagoner], northern constellation traditionally represented as a man, possibly Vulcan, carrying a goat on his shoulder while driving a chariot. It lies ...

Aldebaran

(Encyclopedia)Aldebaran ălˌdĕbˈərən [key], brightest star in the constellation Taurus; Bayer designation α Tauri; 1992 position R.A. 4h35.5m, Dec. +16°30′. An orange giant star (spectral class K5 III) wit...

Perseus, in astronomy

(Encyclopedia)Perseus, in astronomy, northern constellation lying E of Cassiopeia and N of Taurus. It contains the bright star Mirfak (Alpha Persei) and Algol (Beta Persei), a visible variable star of the type know...

Algol, in astronomy

(Encyclopedia)Algol ălˈgŏl [key], famous variable star in the constellation Perseus; Bayer designation β Persei; 1992 position R.A. 3h07.7m, Dec. +40°55′. Algol's variation in apparent magnitude, from 2.06 t...

transit instrument

(Encyclopedia)transit instrument or transit, telescope devised to observe stars as they cross the meridian and used for determining time. Its viewing tube swings on a rigid horizontal axis restricting its movements...