Halleys Comet: Named for the English astronomer, Edmund Halley, who correctly predicted, in 1682, the comet's return in 1759. One of the most brilliant comets viewed from Earth, it reappears approximately every seventy-seven years.

 

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Halleys Comet: Named for the English astronomer, Edmund Halley, who correctly predicted, in 1682, the comet's return in 1759. One of the most brilliant comets viewed from Earth, it reappears approximately . . . View Full Definition

Picometer: One picometer is 10-12 meters.

Cometta: Red wine variety grown in central Italy. Used as an ingredient in sweet wine blends.

Comet: From the Latin cometa, literally hair of the head, figuratively, tail of a comet. A bright star-like heavenly body, composed of masses of tiny particles and gases, which follows an eccentric . . . View Full Definition