Kronotsky Nature Reserve Kronotsky Nature Reserve Kronotsky (Кроноцкий) Nature Reserve (also: "Kronotsky Biosphere Zapovednik") is a nature area reserved for the study of natural sciences in the remote Russian Far East, on the coast of the Kamchatka Peninsula. It was created in 1934 and its current boundary contains an area of . The largest lake in the reserve is Lake Kronotskoye, which covers an area of . It also has Russia's only geyser basin, plus several mountain ranges with numerous volcanoes, both active and extinct. Due to its often harsh climate and its mix of volcanoes and geysers, it is frequently described as
Extinct comet Sun. Roughly six percent of the near-Earth asteroids are thought to be extinct nuclei of comets which no longer experience outgassing. Suspected or theorized extinct comets include: Extinct comet An extinct comet is a comet that has expelled most of its volatile ice and has little left to form a tail and coma. In a dormant comet, rather than being depleted, any remaining volatile components have been sealed beneath an inactive surface layer. Due to the near lack of a coma and tail, an extinct or dormant comet may resemble an asteroid rather than a comet and blur the distinction