Origin of cometMiddle English comete from Old English cometa and Old French comete, both from Classical Latin cometa from Classical Greek kom?t?s, literally , long-haired Americanism from kom?, literally , hair of the head
The McNaught comet at sunset.
The definition of a comet is a celestial body that moves around the sun, and as it goes near the sun it forms a vapor trail of dust and gas that streams after it.
An example of comet is Haley's.
a small, frozen mass of water, gas, rocks, and dust revolving around the sun in a parabolic or elliptical orbit: as it nears the sun it vaporizes, forming a coma and, usually, a long tail of ions that points away from the sun
A celestial body, observed only in that part of its orbit that is relatively close to the sun, having a head consisting of a solid nucleus surrounded by a nebulous coma up to 2.4 million kilometers (1.5 million miles) in diameter and an elongated curved vapor tail arising from the coma when sufficiently close to the sun. Comets are thought to consist chiefly of ammonia, methane, carbon dioxide, and water.
Origin of cometMiddle English comete from Old English comēta from Late Latin from Latin comētēs from Greek komētēs long-haired (star), comet from komē hair
- com′et·ar′y co·met′ic
A celestial object that orbits the Sun along an elongated path. A comet that is not near the Sun consists only of a nucleus—a solid core of frozen water, frozen gases, and dust. When a comet comes close to the Sun, its nucleus heats up and releases a gaseous coma that surrounds the nucleus. A comet forms a tail when solar heat or wind forces dust or gas off its coma, with the tail always streaming away from the Sun.
- Yes, a comet slamming into the planet or some galactic cataclysm could wipe us all out.
- Memory of the land in Arkansas streaked across her mind like a comet, leaving a trail of questions in its wake.
- In the same year he published his essay on comets, Conamen Novi Systematis Cometarum, which was occasioned by the appearance of the comet of 1680.
- Previous appearances of Halley's comet have been calculated by J.
- Tebbutt's comet in 1881 was the first to be satisfactorily photographed.