| point in opposite direc… | 0.51 |
| stretch across the sky | 0.45 |
| stretch for millions of… | 0.38 |
| consist of gas | 0.35 |
| extend to the top of th… | 0.29 |
| sweep the earth | 0.29 |
| extend more than 250 mi… | 0.25 |
| stretch across the nigh… | 0.25 |
| grow in length | 0.16 |
| visible | 0.54 |
| thin | 0.35 |
| straight | 0.32 |
| more than 40,000 miles | 0.25 |
| small | 0.25 |
| dust | 0.45 |
| sublimating | 0.29 |
| curved | 0.50 |
| left in such a manner | 0.32 |
| illuminated by the sun | 0.29 |
| left in the comet's orb… | 0.25 |
| pointed | 0.25 |
| seen in 2009 | 0.25 |
| seen without the aid of… | 0.20 |
| detected | 0.09 |