by APOD Robot » Mon Jan 18, 2021 5:08 am
The Medulla Nebula Supernova Remnant
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.
[url=https://apod.nasa.gov/apod/ap210118.html] [img]https://apod.nasa.gov/apod/calendar/S_210118.jpg[/img] [size=150]The Medulla Nebula Supernova Remnant[/size][/url]
[b] Explanation: [/b] What powers this unusual nebula? CTB-1 is the expanding gas shell that was left when a massive star toward the constellation of [url=https://en.wikipedia.org/wiki/Cassiopeia_(constellation)]Cassiopeia[/url] exploded about 10,000 years ago. The star likely detonated when it ran out of elements, near its core, that could create [url=http://large.stanford.edu/courses/2011/ph241/olson1/]stabilizing pressure[/url] with [url=https://en.wikipedia.org/wiki/Nuclear_fusion]nuclear fusion[/url]. The resulting [url=https://imagine.gsfc.nasa.gov/science/objects/supernova_remnants.html]supernova remnant[/url], nicknamed the Medulla Nebula for its [url=https://en.wikipedia.org/wiki/Medulla_oblongata]brain-like shape[/url], still glows in [url=https://science.nasa.gov/ems/09_visiblelight]visible light[/url] by the heat generated by its collision with confining [url=https://apod.nasa.gov/apod/ap130924.html]interstellar gas[/url]. Why [url=https://ui.adsabs.harvard.edu/abs/2018PASJ...70..110K/abstract]the nebula[/url] also glows in [url=https://science.nasa.gov/ems/11_xrays]X-ray light[/url], though, [url=https://www.barkbusters.co.uk/images/articles/7a4120f095480e9f2a2ad2a165d90313.jpg]remains a mystery[/url]. One hypothesis holds that an energetic [url=https://en.wikipedia.org/wiki/Pulsar]pulsar[/url] was co-created that powers the nebula with a fast outwardly moving wind. Following this lead, a pulsar has [url=https://ui.adsabs.harvard.edu/abs/2019sros.confE.158K/abstract]recently been found[/url] in [url=https://science.nasa.gov/ems/05_radiowaves]radio waves[/url] that appears to have been expelled by the [url=https://youtu.be/aysiMbgml5g]supernova explosion[/url] at over 1000 kilometers per second. Although the [url=https://www.gxccd.com/art?id=543&cat=1&lang=409]Medulla Nebula[/url] appears as large as a [url=https://apod.nasa.gov/apod/ap160201.html]full moon[/url], it is so faint that it took 130-hours of exposure with two small telescopes in [url=https://youtu.be/unghDml5F_4]New Mexico[/url], [url=https://en.wikipedia.org/wiki/United_States]USA[/url], to create the [url=https://www.rc-astro.com/photo/id1222_big.html]featured image[/url].
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