noun (plural nebulae /ˈnɛbjʊliː/ or nebulas)
1 Astronomy 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.
- Evolutionists believe that the solar system condensed out of a cloud of gas and dust called a nebula, hence the nebular hypothesis.
- We have missions that include active nebulas, swirling dust clouds, moving asteroids and asteroid fields.
- A planetary nebula forms when Sun-like stars gently eject their outer gaseous layers to form bright nebulae with amazing twisted shapes.
1.1 dated A galaxy.
- Then Edward Hubble discovered that the nebulae were other galaxies like ours only much further away than was thought possible.
- In further studies, he showed that these nebulas are actually other galaxies, and he went on to classify them.
- Hubble realized that these spiral nebulae were so far away they were actually galaxies - separate cities of stars - far beyond our own Milky Way.
Mid 17th century (as a medical term): from Latin, literally 'mist'.
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