dwarf spheroidal galaxy


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dwarf spheroidal galaxy

[¦dwȯrf sfir¦ȯid·əl ′gal·ik·sē]
(astronomy)
One of the smallest and faintest of the dwarf galaxies, with an effective radius of 200-1000 parsecs and an absolute visual magnitude between -8 and -13.
References in periodicals archive ?
Leo I is a dwarf spheroidal galaxy discovered in 1950 by Albert George Wilson on a photographic plate taken with the 48-inch Schmidt camera at Palomar Observatory.
A further object for confusion is Leo I--a dwarf spheroidal galaxy.
Based on this evidence, "I immediately jumped to the conclusion that this was a dwarf spheroidal galaxy," Irwin says.