Credit & Copyright: Russell Croman
Explanation:
What powers this unusual nebula?
CTB-1 is the expanding gas shell that was left when a massive star toward the constellation
of
Cassiopeia
exploded about 10,000 years ago.
The star likely detonated when it ran out of elements, near its core, that could
create
stabilizing pressure with
nuclear fusion.
The resulting
supernova remnant, nicknamed the Medulla Nebula for its
brain-like shape, still glows in
visible light by the
heat generated by its collision with confining
interstellar gas.
Why
the nebula also glows in
X-ray light, though,
remains a mystery.
One hypothesis holds that an energetic
pulsar
was co-created that powers the nebula with a fast outwardly moving wind.
Following this lead, a pulsar has
recently been found in
radio waves
that appears to have been expelled by the
supernova explosion
at over 1000 kilometers per second.
Although the Medulla Nebula appears as large as a
full moon,
it is so faint that it took 130-hours of exposure with
two small telescopes in
New Mexico,
USA, to create the
featured image.
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.
|
Publikacii s klyuchevymi slovami:
supernova remnant - ostatok Sverhnovoi
Publikacii so slovami: supernova remnant - ostatok Sverhnovoi | |
Sm. takzhe:
Vse publikacii na tu zhe temu >> | |
