Credit & Copyright: Wang Jin
Explanation:
The Gum Nebula is so large and close it is actually
hard to see.
This interstellar expanse of glowing
hydrogen gas frequently evades
notice because it spans 35 degrees -- over 70 full Moons -- while much of it is quite
dim.
This featured spectacular 90-degree wide mosaic, however, was designed to be
both wide and deep enough to bring up
the Gum -- visible in red on the right.
The image was acquired late last year with both the
foreground -- including
Haba Snow Mountain -- and the background
-- including the
Milky Way's central band --
captured by the same camera
and from the same location in
Shangri-La,
Yunnan,
China.
The Gum Nebula is so close that we are only about
450 light-years
from the front edge, while about 1,500 light-years
from the back edge.
Named for a cosmic cloud hunter, Australian astronomer
Colin Stanley Gum
(1924-1960), the origin of this
complex
nebula is still being debated.
A leading theory for the origin of the
Gum Nebula is that
it is the remnant of a million year-old
supernova explosion,
while a competing theory holds that
the Gum is a
molecular cloud
shaped over eons by multiple supernovas and the outflowing
winds of several massive stars.
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Publikacii s klyuchevymi slovami:
supernova remnant - ostatok Sverhnovoi - emissionnaya tumannost'
Publikacii so slovami: supernova remnant - ostatok Sverhnovoi - emissionnaya tumannost' | |
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