| 释义 |
Owl nebula
Owl nebula (M97; NGC 3587) A relatively large, distinctively shaped planetary nebula in the constellation Ursa Major, about 500 parsecs away.Owl Nebula[′au̇l ′neb·yə·lə] (astronomy) A large planetary nebula in Ursa Major which has two large, circular darker areas in an otherwise opaque spherical shell. |