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high-velocity cloud
释义
high-velocity cloud
high-velocity cloud
[
′hī və′läs·əd·ē ′klau̇d
]
(astronomy)
A rapidly moving interstellar cloud with a radial velocity greater than about 12 miles (20 kilometers) per second, consisting primarily of neutral atomic hydrogen, observed in the ultraviolet.
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更新时间:2025/6/3 13:01:30