| 释义 |
nebulaneb‧u‧la /ˈnebjələ/ noun (plural nebulae /-liː/) [countable]   nebulaOrigin: 1600-1700 Latin ‘mist, cloud’ - A nearby nebula, orange and pink, was the lurid gaseous residue of an explosion.
- According to present-day ideas, a star begins its career by condensing out of a cloud of dust and gas known as a nebula.
- As before, the star condenses out of a nebula, heats up, and begins to shine by the hydrogen-into-helium process.
- By sheer coincidence Kappa Crucis lies at the edge of the dark nebula known as the Coal Sack.
- Explosions flared like novas inside a dust nebula.
- The nebula is nearly 50 light-years in diameter, and may owe much of its illumination to Deneb.
- The Eta Carinæ nebula is visible with the naked eye.
- Then, for a relative blink of about 1, 000 years or less, the star becomes a planetary nebula.
► Astronomyasteroid, nounastro-, prefixastronaut, nounastronomical, adjectiveastronomy, nounastrophysics, nounAU, aurora borealis, nounBig Bang, the, nounblack hole, nouncelestial, adjectivecomet, nounconstellation, nouncorona, nouncosmic, adjectivecosmic ray, nouncosmology, nouncosmonaut, noundead, adjectiveearth, nouneclipse, nouneclipse, verbecliptic, nounequinox, nounescape velocity, nounextraterrestrial, adjectivegalactic, adjectivegalaxy, noungeostationary orbit, nounHubble Space Telescope, the, infinity, nounintergalactic, adjectiveinterplanetary, adjectiveinterstellar, adjectiveJupiter, nounlaunch, verblaunch, nounlight year, nounLittle Bear, lunar, adjectivelunar month, nounmagnitude, nounMars, nounMercury, nounmeteor, nounmeteoric, adjectivemeteorite, nounMilky Way, the, month, nounmoon, nounmorning star, nounNASA, nounnebula, nounNeptune, nounnew moon, nounnova, nounobservatory, nounorbit, verborbit, nounorbiter, nounouter space, nounphase, nounplanet, nounplanetarium, nounplasma, nounPluto, nounquadrant, nounquarter, nounquasar, nounradio telescope, nounring, nounrocket, nounsatellite, nounSaturn, nounsea, nounshooting star, nounsolar, adjectivesolar system, nounspace, nounspace capsule, nounspacecraft, nounspace probe, nounspaceship, nounspace shuttle, nounspace station, nounstar, nounstargazer, nounsteady state theory, nounstellar, adjectivesun, nounsunspot, nounsupernova, nountelescope, nountelescopic, adjectiveterrestrial, adjectiveUranus, nounVenus, nounwane, verbwax, verbwhite dwarf, nounworld, nounzenith, noun 1a mass of gas and dust among the stars, which often appears as a bright cloud in the sky at night2a galaxy (=mass of stars) which appears as a bright cloud in the sky at night—nebular adjective |