NEBULA

Nebula

A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases. Originally, nebula was a name for any diffuse astronomical object, including galaxies beyond the Milky Way. The Andromeda Galaxy, for instance, was referred to as the Andromeda Nebula before the true nature of galaxies was confirmed in the early 20th century by Vesto Slipher, Edwin Hubble, et al. Nebulae are often star-forming regions, such as in the Eagle Nebula. This nebula is depicted in one of NASA's most famous images, the "Pillars of Creation". In these regions the formations of gas, dust, and other materials "clump" together to form ...

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nebula

Noun

  1. A cloud in outer space consisting of gas or dust (e.g. a cloud formed after a star explodes).
  2. A white spot or slight opacity of the cornea.
  3. A cloudy appearance in the urine


The above text is a snippet from Wiktionary: nebula
and as such is available under the Creative Commons Attribution/Share-Alike License.

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