castor

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castor:

see beaverbeaver,
either of two large aquatic rodents, Castor fiber and Castor canadensis, known for their engineering feats. They were once widespread in N and central Eurasia except E Siberia, and in North America from the arctic tree line to the S United States.
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.

Castor

(kăs`tər), bright star in the constellation GeminiGemini
[Lat.,=the twins], northern constellation lying on the ecliptic (the sun's apparent path through the heavens) between Taurus and Cancer, N of Canis Minor; it is one of the constellations of the zodiac. Gemini is traditionally depicted as two men.
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; Bayer designation α Geminorum; 1992 position R.A. 7h34.1m, Dec. +31°54'. Slightly dimmer than PolluxPollux,
brightest star in the constellation Gemini; Bayer designation Beta Geminorum; 1992 position R.A. 7h44.8m, Dec. +28°03'. An orange giant of spectral class K0 III, it is the nearest giant star, lying at a distance of 35 light-years.
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, with which it forms the Twins, Castor has an apparent magnitudemagnitude,
in astronomy, measure of the brightness of a star or other celestial object. The stars cataloged by Ptolemy (2d cent. A.D.), all visible with the unaided eye, were ranked on a brightness scale such that the brightest stars were of 1st magnitude and the dimmest stars
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 of 1.58, which still makes it one of the 25 brightest stars in the sky. Castor is actually a six-star system, being a visual triple each component of which is a 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
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; the three components are an eclipsing binary and a pair of spectroscopic binaries. The two brightest components are white, main-sequence stars of spectral classesspectral class,
in astronomy, a classification of the stars by their spectrum and luminosity. In 1885, E. C. Pickering began the first extensive attempt to classify the stars spectroscopically.
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 A1 and A5. The system is about 50 light-years distant.

Castor

(kass -ter, kahss -) (α Gem) A white star that is the second-brightest in the constellation Gemini. It is a visual triple star, the two brighter components having an orbital period of about 470 years; the third component, a flare star, is located some distance away. All three are spectroscopic binaries. mv : 1.9 (A), 2.9 (B), 1.57 (AB); Mv : 0.5 (AB); spectral type: A1 V (A), A2 V (B); distance: 15 pc.

Castor

[′kas·tər]
(astronomy)
A multiple star of spectral classification A0 in the constellation Gemini; the star α Geminorum.

castor

1. the brownish aromatic secretion of the anal glands of a beaver, used in perfumery and medicine
2. the fur of the beaver
3. a less common name for beaver
References in periodicals archive ?
La estructura de Castores funciona en base a equipos mixtos, con tres niveles por grupos de edad y una dinamica de reuniones semanales.
En este contexto, tanto la Administracion de Parques Nacionales como la Provincia de Tierra del Fuego fueron pioneras en generar dos areas libres de castores, como se menciono mas arriba.
Los catalanes son industriosos por espiritu de imitacion, reunidos en pueblo, en comunidad nacional, es decir, en el seno de sus familias, a la vista de otros que les ayuden con su exemplo; semejantes a los castores, cuya industria maravillosa queda reducida a un instinto puramente pasivo quando se les dispersa y desune de su sociedad (53).
Si bien algunos sitios en islas como Tierra del Fuego y Navarino se han reportado especies de fauna introducidas, especifi-camente castores y salmonidos, que son depredadores de fauna bentonica (Vila et al., 1999; Anderson & Rosemond, 2007), pero en este caso las poblaciones de anfipodos se ven incrementadas por altos niveles de materia organica particulada (Anderson & Rosemond, 2007).
A statistics of monuments erected by Illyrians in Dacia (most in Alburnus Maior and Ampelum, but also in Apulum, Potaissa, Napoca) indicates that Jupiter optimus maximus was the most popular (in the case of 13 monuments), followed by Silvanus (8) and Apollo (8), Neptunus (5), Janus and Diana (4 monuments each), Liber Pater, Terra Mater, Mercurius (3), Nymphae, Castores, Minerva, Iunona (2) and Sol, Venus, Fortuna, Hercules (1) (52).
As prevalencias de Giardia observadas, de 44% em castores nos Estados Unidos (MONZINGO Jr.; HIBLER, 1987) e de 6,8% em lontras na Espanha (MENDEZ-HERMIDA et al., 2007), reforcam a importancia dos mamiferos aquaticos como fontes de infeccao para a giardiase.
Hay que recordar que Hugo, Paco y Luis tenian mucha experiencia en estos asuntos dado que pertenecian a la tropa de los Pequenos Castores. (2) Donald y sus sobrinos encienden una fogata que cumple con el requisito de seguridad de estar rodeada de un anillo de piedras, pero otros excursionistas no son tan cuidadosos y el bosque se incendia.
Del mismo modo, la region SRY (Sex-determining Region Y chromosome), presente unicamente en el cromosoma Y, ha sido utilizado para el sexaje de muestras de ADN de llama (Drew et al., 1999), venado (Takahashi et al., 1998) y castores (Kuhn et al., 2002).
(8) Transportes Unidos de Mexico (TUM), Centro de Distribucion y Almacenaje de Transportes (DAT), EASO, CENTAURO, SUVI, Julian de Obregon, Castores y III Guerras.
Sin embargo, la introduccion de especies animales por parte del hombre, tales como castores, ciervos colorados, truchas, pone en peligro en algunos lugares los suelos o la fauna autoctona.
Pequena casa de madera de un solo piso, asentada sobre la tierra, en un valle con suave pendiente hacia un pantano ubicado un poco mas abajo, producto del discreto trabajo de los castores. Oiga Alexandrovna vive alli sola todo el verano, frente a los arboles frutales del jardin que se extiende delante de la casa.