Definitions for "Nebulae"
Keywords:  necare
Nebulizer Necare
The term used to refer to anything that astronomers could not classify, for example when distant galaxies were first observed as 'fuzzy patches of light' and it was not known as to what they were they were simply labelled nebulae. In modern times the word has been used to describe large clouds of gas in space (they can be huge - 10's of light years across!). There are many different forms of nebula and their formation is often based on some stage of a star's life - anywhere from the formation of the star (such as the great Orion Nebula which is a region of star formation in the Orion system) until the death of the star (Planetary nebulae are clouds of gas blown free from a dying star and the Crab Nebula is a remnant of a star gone supernova in the Taurus system).
A glowing clouds of gas or dust reflecting the light of nearby stars. | Back to Student Center
Before the `Great Debate', this term referred to any resolved nebulosity observed in the sky. It had also been noticed that a there were different types of nebulae (singular: nebula), one of which had spiral structure and so were referred to as "spiral nebulae." Today "spiral nebulae" are referred to as "spiral galaxies" and "nebulae" refer to large gas and dust clouds that populate a galaxy.
Keywords:  plural, cool, correct, form
the plural form of "nebula"; "nebulas" is also correct, but not as cool.
A dense atmosphere of corporeal substance.