by APOD Robot » Wed Oct 07, 2020 4:05 am
Ou4: A Giant Squid in a Flying Bat
Explanation: A very faint but very large squid-like nebula is visible in planet Earth's sky -- but inside a still larger bat. The Giant Squid Nebula cataloged as Ou4, and Sh2-129 also known as the Flying Bat Nebula, are both caught in this cosmic scene toward the royal
royal constellation Cepheus.
Composed with 55 hours of narrowband image data, the telescopic field of view is 3 degrees or 6 Full Moons across.
Discovered in 2011 by French astro-imager
Nicolas Outters, the Squid Nebula's alluring
bipolar shape is distinguished here by the telltale blue-green
emission from doubly ionized
oxygen atoms. Though apparently
completely surrounded by the reddish
hydrogen emission region Sh2-129, the true distance and nature of the
Squid Nebula have been difficult to determine. Still, a more
recent investigation suggests Ou4 really does lie
within Sh2-129 some 2,300 light-years away. Consistent with that scenario, Ou4 would represent a spectacular outflow driven by HR8119, a
triple system of hot, massive stars seen near the center of the nebula. The truly giant
Squid Nebula would physically be nearly 50
light-years across.
[url=https://apod.nasa.gov/apod/ap201007.html] [img]https://apod.nasa.gov/apod/calendar/S_201007.jpg[/img] [size=150]Ou4: A Giant Squid in a Flying Bat[/size][/url]
[b] Explanation: [/b] A very faint but very large squid-like nebula is visible in planet Earth's sky -- but inside a still larger bat. The Giant Squid Nebula cataloged as Ou4, and Sh2-129 also known as the Flying Bat Nebula, are both caught in this cosmic scene toward the royal [url=https://en.wikipedia.org/wiki/Cepheus_(constellation)]royal constellation[/url] Cepheus. [url=https://astrophotomannheim.de/images/sh2-129-ou4/]Composed with[/url] 55 hours of narrowband image data, the telescopic field of view is 3 degrees or 6 Full Moons across. [url=http://arxiv.org/abs/1206.2477]Discovered in 2011 by[/url] French astro-imager [url=http://outters.fr/wp/?page_id=50]Nicolas Outters[/url], the Squid Nebula's alluring [url=https://apod.nasa.gov/apod/ap200913.html]bipolar shape[/url] is distinguished here by the telltale blue-green [url=https://en.wikipedia.org/wiki/Nebulium]emission from[/url] doubly ionized [url=https://periodic.lanl.gov/8.shtml]oxygen[/url] atoms. Though apparently [url=https://ic.pics.livejournal.com/merleblanc84/72357974/752179/752179_original.jpg]completely surrounded[/url] by the reddish [url=https://periodic.lanl.gov/1.shtml]hydrogen[/url] emission region Sh2-129, the true distance and nature of the [url=https://en.wikipedia.org/wiki/Squid#/media/File:Composite_diagram_illustrating_basic_squid_features,_ventral_aspect.jpg]Squid[/url] Nebula have been difficult to determine. Still, a more [url=https://ui.adsabs.harvard.edu/abs/2014A%26A...570A.105C/abstract]recent investigation[/url] suggests Ou4 really does lie [url=http://www.astroanarchy.blogspot.fi/2013/12/a-start-of-new-project-cepheus-mosaic.html]within Sh2-129[/url] some 2,300 light-years away. Consistent with that scenario, Ou4 would represent a spectacular outflow driven by HR8119, a [url=http://www.nasa.gov/feature/goddard/2016/newly-discovered-planet-has-3-suns]triple[/url] system of hot, massive stars seen near the center of the nebula. The truly giant [url=https://apod.nasa.gov/apod/ap140718.html]Squid Nebula[/url] would physically be nearly 50 [url=https://spaceplace.nasa.gov/light-year/en/]light-years[/url] across.
[table][tr][td=left][url=http://asterisk.apod.com/discuss_apod.php?date=201006][b]<< Previous APOD[/b][/url][/td] [td=center][url=http://asterisk.apod.com/view_retro.php?date=1007][b]This Day in APOD[/b][/url][/td] [td=right][url=http://asterisk.apod.com/discuss_apod.php?date=201008][b]Next APOD >>[/b][/url][/td][/tr][/table]