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comet    音标拼音: [k'ɑmət]
n. 慧星

慧星

comet
n 1: (astronomy) a relatively small extraterrestrial body
consisting of a frozen mass that travels around the sun in
a highly elliptical orbit

Comet \Com"et\, n. [L. cometes, cometa, from Gr. ? comet, prop.
long-haired, fr. ? to wear long hair, fr. ? hair, akin to L.
coma: cf. F. com[`e]te.] (Astron.)
A member of the solar system which usually moves in an
elongated orbit, approaching very near to the sun in its
perihelion, and receding to a very great distance from it at
its aphelion. A comet commonly consists of three parts: the
nucleus, the envelope, or coma, and the tail; but one or more
of these parts is frequently wanting. See Illustration in
Appendix.
[1913 Webster]

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  • Comet - Wikipedia
    A comet is an icy, small Solar System body or interstellar object that warms and begins to release gases when passing close to the Sun, a process called outgassing This produces an extended, gravitationally unbound atmosphere or coma surrounding the nucleus, and sometimes a tail of gas and dust gas blown out from the coma
  • COMET - Science Fiction Movies and Entertainment Television Channel
    We relish everything out-of-this-world and the fans who love it, with some of the most iconic franchises including The X-Files, Stargate SG-1, Buffy The Vampire Slayer, and Grimm, plus fun movie titles that celebrate your sci-fi and fantasy fandom
  • Comets - Science@NASA
    Comets are cosmic snowballs of frozen gases, rock, and dust that orbit the Sun When frozen, they are the size of a small town When a comet's orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets
  • Next Comet Visible from Earth in 2026: Upcoming Comets to Watch
    As the comet recedes from both the Sun and Earth, it is moving into the southern sky and gradually becoming fainter Looking ahead, the next promising comet is 10P Tempel This short-period comet is expected to reach its peak brightness in July and August 2026
  • Comet Browser: a Personal AI Assistant
    Comet browser by Perplexity is the AI browser that acts as a personal assistant Automate tasks, research the web, organize your email, and more with Comet
  • COMET - MetEd Education and Training
    The COMET® Program is celebrating 35 years of serving the geosciences community We develop thousands of free education training materials for weather enthusiasts, educators, professionals - and everyone in between
  • Comet | Definition, Composition, Facts | Britannica
    Comet, a small body orbiting the Sun with a substantial fraction of its composition made up of volatile ices Comets are among the most-spectacular objects in the sky, with their bright glowing comae and their long tails
  • Rare Comet Visible For First Time In 170,000 Years This Weekend - Forbes
    Days after astronauts on NASA ’ s Artemis II mission witnessed a total solar eclipse from the moon ’ s far side, a new comet is emerging in the predawn sky — and it could soon become visible to
  • Comets Visible Tonight
    We have highlighted 59 comets with a magnitude of 20 or less that are more likely to be observable The list updates regularly to reflect changes in visibility, and we display only those that are visible tonight at your location
  • How to see rare comet R3 PanSTARRS as it passes Earth this April
    A newly discovered comet, comet C 2025 R3 (PanSTARRS), which appears to have been traveling in the solar system since September, is set to make a debut in the Northern Hemisphere this month,





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