| Quaoar's composition is theorized to be largely ices mixed with rock, not unlike that of a comet, though 100 million times greater in volume. |
| Compared with other genotoxicity tests, the comet assay is a cheap and simple method. |
| It can draw multiple light curves in several returns of a periodic comet in one graph. |
| The comet is now revolving around the Sun every 6.6 years on an elliptical orbit with a low inclination compared to that of the Earth. |
| Rosetta will reach the comet in 2014, enter into orbit and deliver a lander, Philae, onto the surface. |
| The rock was a meteorite, blasted off the Red Planet long ago by the impact of a comet. |
