| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| famous comets in history | 1.15 | 0.8 | 6436 | 96 | 24 |
| famous | 1.97 | 0.7 | 9616 | 42 | 6 |
| comets | 1.81 | 0.4 | 4656 | 59 | 6 |
| in | 1.71 | 0.9 | 9451 | 21 | 2 |
| history | 0.12 | 0.4 | 1398 | 18 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| famous comets in history | 0.37 | 0.1 | 6167 | 73 |
| famous comets seen from earth | 1.13 | 0.1 | 6247 | 92 |
| the most famous comet | 0.01 | 0.9 | 1169 | 90 |
| brightest comets in history | 1.11 | 0.3 | 3386 | 50 |
| what's the most famous comet | 1.5 | 0.2 | 2913 | 76 |
| famous comet in space | 1.8 | 0.6 | 583 | 41 |
| astronomer origin of comets | 1.66 | 0.7 | 8258 | 84 |
| list of known comets | 1.81 | 0.5 | 8940 | 43 |
| nasa list of historical comets | 0.95 | 0.5 | 585 | 41 |
| major comets 20th century | 0.55 | 0.9 | 7807 | 14 |
| list of great comets | 1.63 | 0.2 | 2160 | 94 |
| when were comets discovered | 1.57 | 0.8 | 1725 | 70 |
| the famous comet was named after what | 1.55 | 0.9 | 5706 | 21 |
| interesting facts about comets | 0.85 | 0.1 | 1419 | 43 |
| famous comet of the 1990s | 0.54 | 1 | 8021 | 45 |
| origin of the comets | 0.45 | 0.1 | 9168 | 70 |
| who discovered the comet | 0.82 | 0.8 | 328 | 51 |
| first american to discover a comet | 1.62 | 0.5 | 8884 | 18 |
