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Астронет: Астрономическая картинка дня Чудная планетарная туманность NGC 5189 http://www.variable-stars.ru/db/msg/1161844/eng |
Credit & Copyright: Anglo-Australian Telescope
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Explanation:
After a Sun-like
star can no longer support
fusion in its core,
the center condenses into a
white dwarf while the outer atmospheric layers are
expelled into space and appear as a
planetary nebula. This particular
planetary nebula has a quite strange and
chaotic structure. The inner part
of this nebula contains an unusual expanding ring of gas that we see nearly
edge-on. The exact mechanism that expels the
planetary nebula gas is a
current topic of astronomical speculation and research.
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
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NASA Official: Jay Norris.
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rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.