Feb
21
2014

nebula

Posted in Word of the Day by admin

neb yə lə
noun
1. a cloud of interstellar dust or gas or both, that may appear as either a light or dark mass depending on how it absorbs, reflects, or re-emits incident radiation.
2. a similar luminous mass of stars too far away to be seen as individual bodies; galactic nebula.

Word History  Nebula is a Latin word that means “cloud or mist.” It entered the English language in the 1500s as a term for the clouding of the eye we now call a “cataract.” In the 1700s, “nebula” became a term in astronomy.

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