| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what comet passed earth in 1997 | 1.87 | 0.2 | 442 | 6 |
| what comet passed earth recently | 0.49 | 0.9 | 1237 | 83 |
| comet that appeared in 1997 | 1.79 | 0.1 | 2743 | 96 |
| what comet was visible in 1997 | 1.46 | 0.2 | 1949 | 88 |
| when did the comet hit earth | 1.13 | 0.8 | 8477 | 42 |
| what comet was seen in 1996 | 0.21 | 0.3 | 179 | 51 |
| comet passing the earth | 0.22 | 0.9 | 4043 | 100 |
| what comet was visible in 1996 | 0.77 | 0.5 | 2340 | 14 |
| when did the green comet pass earth | 0.31 | 0.6 | 3609 | 36 |
| march 22 1997 comet | 0.68 | 0.3 | 595 | 65 |
| the year of the comet | 1.6 | 0.2 | 5053 | 87 |
| comet coming to earth | 1.57 | 0.9 | 2210 | 80 |
| last comet to pass earth | 0.19 | 0.8 | 6623 | 74 |
| comet going by earth | 0.72 | 0.5 | 4830 | 82 |
| comet in the 1990s | 0.9 | 0.3 | 1156 | 74 |
| when was the first comet discovered | 0.78 | 0.2 | 9356 | 29 |
| who discovered the comet | 1.37 | 0.9 | 913 | 68 |
| comet 12000 years ago | 1.09 | 0.5 | 8387 | 80 |
| when did the comet is coming start | 0.36 | 0.7 | 7742 | 88 |
| when did comets form | 1.31 | 0.1 | 4957 | 36 |
