| Answer | Crossword Clue |
|---|---|
| NEBULA | Interstellar gas cloud |
| NEBULA | Cloud of interstellar gas and dust |
| NEBULA | Cloud of interstellar gas or dust |
| NEBULA | Interstellar cloud |
| NEBULA | Interstellar dust cloud |
| NEBULA | Cloud of interstellar dust |
| OORT | .. cloud: comet-filled region in interstellar space |
| OMEGANEBULA | Interstellar cloud in the Sagittarius area of the Milky Way |
