|
|
 |
|
|
|
|
| Coal·sack [ kṓl sàk ] |
noun |
|
| Definition: |
| |
1. interstellar cloud seen in southern hemisphere: a dark cloud of interstellar dust nebula, part of the Crux constellation and visible in the southern hemisphere in front of the Milky Way
|
2. interstellar cloud seen in northern hemisphere: a dark interstellar cloud nebula of the northern hemisphere near the constellation Cygnus
|
|
|
|
