spheroidal

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A spheroid
Like a spheroid. Roughly spherical, approximately round, roughly ball shaped
{a} having the form of a spheroid
{s} of or pertaining to a spheroid; having a shape that is almost spherical
in the form of an ellipse
dwarf spheroidal
A dwarf spheroidal galaxy

Slightly larger dwarf spheroidals are known to be the single most common kind of galaxy in rich clusters like that seen past the constellation Virgo.

dwarf spheroidal galaxy
A faint galaxy, devoid of gas, having a higher than normal proportion of dark matter; especially those that orbit the Milky Way and Andromeda

The inventory keeps growing, and the latest recruit is a dwarf spheroidal galaxy, meaning no gas and not many more than 106-7 stars, that has the bad luck to be almost on the far side of the galactic centre from us.

spheroidal.
spheroidical
spheroidal
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