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A cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
- ‘The reason why most planetary nebulae are not spherical is not well understood.’
- ‘"Planetary nebulae are shells of gas ejected by dying stars, " Kastner explains.’
- ‘Evolutionists believe that the solar system condensed out of a cloud of gas and dust called a nebula, hence the nebular hypothesis.’
- ‘A planetary nebula forms when Sun-like stars gently eject their outer gaseous layers to form bright nebulae with amazing twisted shapes.’
- ‘Until recently, it was thought that shells around planetary nebulae were a rare phenomenon.’
- ‘For example, consider the shapes of nebulae - those swirling clouds of gas and dust in which newly hatched stars begin to shine.’
- ‘The composition of Phoebe should reflect the composition of the region of the solar nebula where it formed.’
- ‘Jupiter's core formed rapidly relative to the rate at which gas was lost from the solar nebula.’
- ‘By what principle the ship created and continued to produce the bubble shielding it from the nebula's gasses.’
- ‘Based on the nebula's distance of 650 light-years, its angular size corresponds to a huge ring with a diameter of nearly three light-years.’
- ‘We have missions that include active nebulas, swirling dust clouds, moving asteroids and asteroid fields.’
- ‘Thus, meteorites represent a fossil record of the early conditions of the solar nebula.’
- ‘Edwin Hubble quickly began a detailed study of the spiral nebulae.’
- ‘Astronomers suspect that the distant emissions may emanate from the same type of nebulas.’
- 1.1dated A galaxy.
star system, solar system, constellation, cluster, nebulaView synonyms
- ‘The large globe with clustered nebulas and speckled stars and solar systems that were scattered with planets, suns and moons rotated slowly and gently.’
- ‘In further studies, he showed that these nebulas are actually other galaxies, and he went on to classify them.’
- ‘Hubble's discovery showed that spiral nebulae are entire systems of stars in their own right, as huge and as packed with stars as our own Milky Way.’
- ‘Then Edward Hubble discovered that the nebulae were other galaxies like ours only much further away than was thought possible.’
- ‘It is a nebulae system, planets and stars bobbing in and out of blue, purple, and pink stardust.’
- ‘We sometimes use the word nebula to refer to galaxies, various types of star clusters, and various kinds of interstellar dust or gas clouds.’
- ‘Then if he'd looked farther, deeper, he saw star systems, colorful nebulas never before seen in his dreams.’
- ‘The colours of unreachable nebulas mingled with the darkness and desolation of space.’
- ‘In early 1845, before his telescope was completed, Rosse had resolved his first nebula, discovering it to be a spiral galaxy of stars.’
- ‘Heber Curtis had been correct in the 1920 debate; many of the nebulae were indeed remote galaxies.’
- ‘Hubble realized that these spiral nebulae were so far away they were actually galaxies - separate cities of stars - far beyond our own Milky Way.’
- ‘It was only in the 1920's that the American astronomer Hubble established that some of these nebulae were indeed distant galaxies comparable in size to our own Milky Way.’
A clouded spot on the cornea causing defective vision.
- ‘The bruise over his eye had settled in to a purple nearly matching the nebula itself, but the swelling had reduced dramatically.’
- ‘It treats conjunctivitis, pterygium, nebula and pain in the eyes.’
Mid 17th century (as a medical term): from Latin, literally mist.
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