| 释义 |
high-velocity clouds high-velocity clouds Small molecular and diffuse clouds, often far from the galactic plane, that have radial velocities differing significantly – sometimes up to 100 km s–1 – from those predicted by a simple Galactic rotation curve. Some may be associated with tidal effects, such as the Magellanic Stream (see Magellanic Cloud), while others are more likely due to galactic fountains. |