Astronomy Picture of the Day



NGC 7635: The Bubble

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#95235 by @ 19.10.2006 00:00 - nach oben -
NGC 7635: The Bubble


Explanation:
What created this huge space bubble?

Blown by the wind from a star, this
tantalizing, ghostly
apparition is cataloged as NGC 7635, but known simply
as The
Bubble Nebula
.

Astronomer Eric Mouquet's
striking view utilizes a long exposure with
hydrogen alpha
light to reveal the intricate details of
this cosmic bubble and its environment.

Although it looks delicate, the 10
light-year
diameter bubble offers evidence of
violent processes at work.

Seen here above and right of the Bubble's center is a bright
hot star embedded in reflecting dust.

A fierce
stellar wind
and intense radiation from the star, which likely has a mass 10 to 20 times that
of the Sun,
has blasted out the
structure of glowing gas
against denser material in a surrounding molecular cloud.

The intriguing Bubble Nebula lies a mere 11,000 light-years away toward the boastful
constellation
Cassiopeia.




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