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nebula    音标拼音: [n'ɛbjələ]
n. 星云,云翳

星云,云翳

nebula
n 1: a medicinal liquid preparation intended for use in an
atomizer
2: cloudiness of the urine
3: an immense cloud of gas (mainly hydrogen) and dust in
interstellar space
4: (pathology) a faint cloudy spot on the cornea

Nebula \Neb"u*la\ (n[e^]b"[-u]*l[.a]), n.; pl. {Nebulae}
(n[e^]b"[-u]*l[=e]). [L., mist, cloud; akin to Gr. nefe`lh,
ne`fos, cloud, mist, G. nebel mist, OHG. nebul, D. nevel,
Skr. nabhas cloud, mist. Cf. {Nebule}.]
1. (Astron.) A faint, cloudlike, self-luminous mass of matter
situated beyond the solar system among the stars. The term
was originally applied to any diffuse luminous region.
Now, technically, it is applied to interstellar clouds of
dust and gases ({diffuse nebula}). However distant
galaxies and very distant star clusters often appear like
them in the telescope, such as the {spiral nebula} in
Andromeda, known now to be a distant galaxy.
[1913 Webster PJC]

2. (Med.)
(a) A white spot or a slight opacity of the cornea.
(b) A cloudy appearance in the urine. [Obs.]
[1913 Webster]

19 Moby Thesaurus words for "nebula":
Black Magellanic Cloud, Crab Nebula, Gegenschein,
bright diffuse nebula, coalsack, counterglow, dark cloud,
dark nebula, diffuse nebula, dust cloud, gaseous nebula,
nebula of Lyra, nebular hypothesis, nebulosity, nebulous stars,
planetary nebula, ring nebula, the Coalsack, zodiacal light


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  • What Is a Nebula? | Facts, Definition, What Are They?, Types
    A nebula is a huge cloud of combined gas and dust in space It can contain hydrogen, helium, and or plasma Click for even more facts or information
  • Nebulae Facts For Kids | What?, Formation, Importance, Size, Comparison
    Nebulas' size ranges from millions of miles to hundreds of light-years in diameter Keep reading for more interesting facts perfect for kids
  • Types of Nebulae | Galaxies, Globular Open Clusters
    A typical diffuse nebula is a few hundred light-years across (NGC 2264 shown; see also the Horsehead Nebula) Planetary Nebulae Planetary nebulae are shells of gas thrown out by some stars near the end of their lives Our Sun will probably produce a planetary nebula in about 5 billion years
  • Orion Constellation | Facts, Information, History Definition
    This nebula can be found a third of a degree from the Horsehead Nebula NGC 2023 is around 1,467 light-years away from Earth Monkey Head Nebula The Monkey Head Nebula, designated as NGC 2174, is an emission nebula classified as an H II region It is associated with the open cluster NGC 2175, also located in Orion
  • Andromeda Galaxy Facts - The Nine Planets
    The Andromeda galaxy is the largest galaxy in the Local Group, more than twice the size of the Milky Way Click for even more amazing facts and information
  • Merope Star | Facts, Information, History Definition
    The nebula is also named after Merope and sometimes it is referred to as Tempel’s Nebula – in honor of the German astronomer, Wilhelm Tempel, who discovered it in 1859 The diffuse reflection nebula is the brightest around Merope, where it has an apparent magnitude of 13 The rest of the nebula is fainter than magnitude 16
  • Nebula List - The Nine Planets
    NGC 7293 (Helix Nebula) AAT 48k jpg (David Malin) NGC 7354 BB 5k jpg NGC 7662 (The Blue Snowball) BB 5k jpg UMN 62k gif Antares and the Rho Ophiuchus dark cloud UKS 52k jpg; ROE html (David Malin) Faint nebulosity in Orion UKS 51k jpg (David Malin) GK Per (remnant of Nova Persei 1901) WIYN 134k gif; (caption) WIYN 170k gif; (caption) Henize 70
  • The Origin of the Solar System l The Big Bang - The Nine Planets
    Here is a brief outline of the current theory of the events in the early history of the solar system: A cloud of interstellar gas and or dust (the “solar nebula”) is disturbed and collapses under its own gravity The disturbance could be, for example, the shock wave from a nearby supernova As the cloud collapses, it heats up and compresses in the center It heats enough for the dust to
  • Monoceros Constellation | Facts, Information, Mythology, History . . .
    Monoceros is a faint constellation located on the celestial equator Its name translates to unicorn from Greek Click for more information
  • Eta Carinae (η Carinae) | Facts, Information, History Definition
    Eta Carinae is engulfed by the Homunculus Nebula This nebula is embedded within the much larger Carina Nebula, a large star-forming H II region Carina was part of a larger constellation called the Argo Navis – this constellation represented the ship of Jason and the Argonauts The brightest star, Canopus, marked the ship’s keel





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