| 单词 |
ursa minor system |
| 释义 |
Ursa Minor system Ursa Minor system A dwarf elliptical galaxy that is a member of the Local Group.Ursa Minor system[′ər·sə ′mī·nər ‚sis·təm] (astronomy) A dwarf spheroidal galaxy in the Local Group, about 2.1 × 105 light-years (1.2 × 1018 miles or 2.0 × 1018 kilometers) away. |
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