Credit & Copyright: Christophe Vergnes,
Hervc Laur
Explanation:
These brightly outlined flowing shapes look ghostly on a cosmic scale.
A telescopic view
toward the constellation
Cassiopeia, the colorful
skyscape features the swept-back, comet-shaped clouds
IC 59 (left) and IC 63.
About 600 light-years distant,
the clouds
aren't actually ghosts.
They are slowly disappearing though,
under the influence of
energetic radiation
from hot, luminous star gamma Cas.
Gamma Cas is
physically located only 3 to 4 light-years from the
nebulae and lies just above the right edge of the frame.
Slightly closer to gamma Cas, IC 63 is dominated by
red H-alpha light emitted as
hydrogen atoms ionized by the hot star's ultraviolet radiation recombine
with electrons.
Farther from the star, IC 59 shows less H-alpha
emission but more of the characteristic blue tint of dust
reflected star light.
The field of view spans over 1 degree or 10 light-years at the
estimated distance of
the interstellar apparitions.
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr' |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
|
Publikacii s klyuchevymi slovami:
reflection nebula - emission nebula
Publikacii so slovami: reflection nebula - emission nebula | |
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