dwarf galaxy

(astronomy) Any galaxy, considerably smaller than the Milky Way, that has only several billions of stars.

Japanese Meaning

天文学において、ミルキーウェイよりもかなり小さく、星の数が数十億個程度で構成される銀河

The astronomers discovered a faint dwarf galaxy orbiting the edge of the Milky Way.

天文学者たちは、天の川銀河の周辺を回るかすかな矮小銀河を発見した。

Sense（1）

(astronomy) Any galaxy, considerably smaller than the Milky Way, that has only several billions of stars.

dwarf galaxies

（ plural ）