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color index

(Encyclopedia) color index, in astronomy, difference in an object's brightness as recorded between any two well-defined bands of the electromagnetic spectrum by using optical filters of different…

English springer spaniel

(Encyclopedia) English springer spaniel, breed of medium-sized sporting dog developed in England from the broader and very old category of “springing spaniels” that produced many of the present-day…

palomino horse

(Encyclopedia) palomino horse, American light horse that, contrary to popular opinion, is not a breed but a color type. The palomino is a characteristic golden, creamy tan, with an almost white mane…

Spectral Classes for Main Sequence Stars (table)

(Encyclopedia) Characteristics of Spectral Classes for Main Sequence Stars Class Color Surface Temperature Strong Lines O blue-white 35,000℃ ionized helium B blue-white 21,000℃ helium A white…

harp seal

(Encyclopedia) harp seal, crested earless, or true, seal, Phoca groenlandica, found in the N Atlantic around Greenland and the White Sea. In the spring, harp seals migrate southward to assemble in…

stork

(Encyclopedia) stork, common name for members of a family of long-legged wading birds. The storks are related to the herons and ibises and are found in most of the warmer parts of the world. Storks…

vestments

(Encyclopedia) vestments, garments worn by ecclesiastics in ceremonial functions. The cassock, a close-fitting gown buttoning down the front and reaching to the feet, is not a vestment so much as the…

Interview: Edward Ball on Slaves in the Family

"It Cuts Both Ways"I'm sure that you've heard about the proof that Thomas Jefferson fathered children by his slave, Sally Hemings... Bebe Moore Campbell, the novelist, said in a commentary on…

Babbitt metal

(Encyclopedia) Babbitt metal, an antifriction metal first produced by Isaac Babbitt in 1839. In present-day usage the term is applied to a whole class of silver-white bearing metals, or “white metals…