Ultra-diffuse
Definition, Meaning & Examples
Part of speech adjective
Quick meaning: Ultra-diffuse is an adjective meaning Extremely diffuse.
Meaning
Extremely diffuse.
More Meanings
- (astronomy) Specifically, designating a type of galaxy with a very low proportion of visible stars compared to the Milky Way, and hence a very low luminosity.
Example Sentences
In the next sections we study the properties of galaxies that satisfy our criteria to be ultra diffuse, and consider the contribution from galaxies in the fore- and background using the CFHTLS fields.
The galaxy, called NGC1052-DF2, is about 65 million light years away. It is almost as big as the Milky Way but is “ultra-diffuse,” meaning it contains just a vanishing fraction of the stars found in our galaxy—only 1 percent, in this case.
Related Words
Related dictionary entries include ultradiffuse, overdiffuse, diffuse, diffused, ultradense, ultraextensive.
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Sources & Attribution
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