Kreutz Group

Definition

Astronomy

  • Family of ‘Sungrazer’ comets capable of coming very close to the Sun, perhaps within 1–2 million km. In recent years our knowledge of the Kreutz Group has been expanded by observations made by US Air force satellites used for solar observation, which show that encounters between Kreutz comets and the Sun can lead to the comet colliding with the Sun or being destroyed by the intense radiation encountered near it. The known Kreutz Group members have similar retrograde orbits about the Sun.
http://www.dictionarycentral.com/definition/kreutz-group.html