a dwarf spheroidal galaxy

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dwarf spheroidal

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.

a dwarf spheroidal galaxy
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