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Extremely diffuse. / (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.

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ultra-diffuse

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ultra-diffuse

adj

Extremely diffuse. / (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.

The ultra-diffuse galaxy is difficult to observe due to its low surface brightness.

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Extremely diffuse.

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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.

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ultra-diffuse

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