| | Solar system -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-05) |
 | | The name is also sometimes used to refer to asteroids and comets in general, or to asteroids below 10 km in diameter. |
 | | They are subdivided into (Click link for more info and facts about asteroid group) asteroid groups and based on their specific orbital characteristics. |
 | | The theory says that Nemesis creates periodical perturbations in the asteroids and comets of the solar system causing a shower of large bodies and some of them hit Earth causing destruction of life, although this theory is no longer taken seriously by most scientists. |
| www.absoluteastronomy.com /encyclopedia/s/so/solar_system.htm (2791 words) |