| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| planetary nebula definition and evolution | 0.21 | 0.2 | 9225 | 12 | 41 |
| planetary | 0.96 | 0.2 | 9336 | 45 | 9 |
| nebula | 1.38 | 0.2 | 3094 | 27 | 6 |
| definition | 1.2 | 0.9 | 2174 | 76 | 10 |
| and | 1.94 | 0.7 | 2716 | 30 | 3 |
| evolution | 0.67 | 0.2 | 2771 | 66 | 9 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| planetary nebula definition and evolution | 0.22 | 0.9 | 8330 | 3 |
