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 ?
The contract includes the supply of more than 40 new VSAT systems with satellite Internet based on Castors global VSAT network, Inmarsat Fleetbroadband as back-up for the VSAT service and IT support for the vessel LAN infrastructure.
It was investigated that growth and yield parameters of castor bean were increased with increasing levels of nitrogen fertilizers and maximum was at 120 kg N ha-1 (Diniz Neto et al.
Pollux and Castor aren't bright enough to simulate perfectly a truly dazzling conjunction of planets.
The eri silkworms fed on selected castor cultivars registered a significant variation in the economic traits viz.
The transesterification reaction was performed using 150 mg of castor oil and methyl-benzene alcohol at the ratio of 4:1, according to the methodology proposed by Folch, Lees and Sloane-Stanley (1957) and modified by Lepage and Roy (1986).
3 million tonnes castor seed annually from which around 600,000 tonnes oil is extracted, valued at around Rs 4,500 crore.
The starting point of the present work is acrylated castor oil (ACO), of which only little has been published concerning its profile as a resin for coatings, except for analytical studies (Scheme 1).
Meanwhile, Castor is now in the custody of the Police Regional Office in Region VI (PRO-6).
There is a diversity of scientific literature on transesterification of castor oil with ethanol (de Oliveira et al.
The study characterizes the natural history of seed damage by an unidentified Lepidopteran larvae found inside of the pods and feeding on the seeds of Castor Bean (Ricinus communis L.