Definition of dark nebula in English:

dark nebula

Syllabification: dark neb·u·la

noun

Astronomy
A nonluminous nebula of dust and gas that is observable because it obscures light from other sources.
More example sentences
  • In the inner regions of dark nebulae important events take place, such as the formation of stars and masers.
  • There are different forms of nebulas, dark nebulas, emission nebulas and celestial nebulas.
  • In the Cigar Galaxy, there are blank spots where it appears there are not any stars, just dark nebulas.

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Word of the day hubris
Pronunciation: ˈ(h)yo͞obris
noun
excessive pride or self-confidence