| |||
| aurora; aurora polaris; polar aurora | |||
|
aurora : 29 phrases in 5 subjects |
| Astronomy | 15 |
| Communications | 1 |
| Earth sciences | 2 |
| Environment | 9 |
| Natural resourses and wildlife conservation | 2 |
| |||
| aurora; aurora polaris; polar aurora | |||
|
aurora : 29 phrases in 5 subjects |
| Astronomy | 15 |
| Communications | 1 |
| Earth sciences | 2 |
| Environment | 9 |
| Natural resourses and wildlife conservation | 2 |