| Similarity | Rank | |
|---|---|---|
| Telescope | 0.876 | 33291 |
| NASA's | 0.818 | 24421 |
| telescope | 0.811 | 15729 |
| telescopes | 0.802 | 27127 |
| Orbiter | 0.781 | 76431 |
| NASA | 0.773 | 9327 |
| Astronomers | 0.772 | 61630 |
| quasars | 0.772 | 93060 |
| Herschel | 0.767 | 54808 |
| nebulae | 0.763 | 81004 |
| orbiting | 0.759 | 32947 |
| astronomers | 0.759 | 24742 |
| galaxies | 0.757 | 19979 |
| exoplanets | 0.750 | 89365 |
| redshift | 0.745 | 88264 |
| comets | 0.737 | 39333 |
| JPL | 0.737 | 58179 |
| Kepler | 0.736 | 41816 |
| spacecraft | 0.732 | 16461 |
| orbiter | 0.732 | 76092 |
| flyby | 0.732 | 80846 |
| ISON | 0.731 | 79144 |
| Cassini | 0.730 | 49105 |
| comet | 0.726 | 23908 |
| Jupiter's | 0.722 | 61517 |