Astronomy

Astronomy? Find a galaxy of information here.

Upgrade to Britannica Online

Take a tour, New improved britannica online

Imagine Britannica's 32-volume encyclopedia online right there for you, plus full access to articles. Amazing content, written by world experts, that you can cite for projects and assignments.

Click here for Britannica shop

Chiron

Comet once thought to be the most distant known asteroid. Discovered in 1977, it travels in an unstable, eccentric orbit between those of Saturn and Uranus. In 1989 astronomers detected a fuzzy cloud (coma) around Chiron. Because such a cloud is a defining feature of comets, Chiron was reclassified as a comet. See also Centaur object.

Find more information on Chiron. Upgrade to Britannica Online for more on Chiron.

  • Britannica, just as colourful as Singapore
  • Singapore is a legendary city. Britannica has a legendary reputation for knowledge. With just a few clicks you can access all the quality information you can trust, online.