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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 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 - Wikipedia
    These phenomena are due to the effects of solar radiation and the outstreaming solar wind plasma acting upon the nucleus of the comet Comet nuclei range from a few hundred meters to tens of kilometers across and are composed of loose collections of ice, dust, and small rocky particles
  • Comets - Science@NASA
    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 The dust and gases form a tail that stretches away from the Sun for millions of miles
  • 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
  • NASA unveils new close-up images of massive comet from outside solar . . .
    NASA releases new images of rare interstellar comet David Jewitt, professor of astronomy at UCLA, discusses the comet known as 3I Atlas, which is only the third confirmed object to visit our corner of the cosmos from another star
  • What Is a Comet? Comet Facts, Structure, and Appearance - Star Walk
    When a comet is in the inner Solar System, the Sun warms it up, causing the comet's ice to vaporize and release dust and gas particles The solar wind blows those particles off the comet, and we see the dust and ion tails
  • Comet Dry Cleaners and Laundry
    Since 1957, Comet Cleaners has cleaned clothing items from wool to fine silk We make sure your experience with our dry cleaning and laundry service is awesome
  • Halleys Comet - WorldAtlas
    Halley's Comet Halley's Comet is the most famous comet in history and the first one ever recognized as a regular visitor to Earth's neighborhood It loops around the Sun every 74 to 79 years, with the exact timing nudged by the gravity of Jupiter and Saturn Its last close pass to the Sun came on February 9, 1986
  • Comets: Everything you need to know | Space
    Comets are icy leftovers from the formation of the solar system Explore these 'dirty snowballs' in more detail with our ultimate comet guide
  • Comet Information and the International Comet Quarterly (ICQ)
    This is a key place to begin looking for useful and accurate information regarding news, observations, orbital data, designations and names, and good links regarding comets and related topics [sponsored by the International Comet Quarterly (ICQ)]





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