Planetary nebula

From CityDeepSky
Revision as of 07:39, 16 January 2009 by Evilscientist (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Planetary nebula are caused by stars that have blown off their outer atmosphere. They gained their name due to the fact they looked like planets through early telescopes.

Retrieved from "http://www.citydeepsky.com/wiki/index.php?title=Planetary_nebula&oldid=1545"