| According to Brownlee, the loose aggregate of particles seen on comets may represent the first generation of solids in the solar system. |
| Both comets and asteroids are the left-over building blocks of the planets in our solar system. |
| In contrast, Jupiter-family comets tend to have predictable, well-determined orbits with short periods and low inclinations. |
| Unlike Kuiper belt comets, Oort cloud comets can rain down on the inner solar system from any angle and any direction. |
| They will be studying water, carbon monoxide, ammonia and methanol four of the most abundant gases from comets. |
| Our star system is chock full of asteroids and comets, in every conceivable orbit and location. |
