Просмотр кода страницы Английская Википедия:Heart Nebula

{{Английская Википедия/Панель перехода}}
{{short description|Emission nebula in the constellation Cassiopeia}}
{{Infobox nebula
| name = Heart Nebula
| image = Heartandfish32hours.jpg
| caption = Heart Nebula, with Fish Head Nebula on top right corner, [[Astronomical filter#Narrowband filters|narrowband image]] captured on a 70mm scope 
| type = H II region
| epoch = J2000.0
| ra = {{RA|02|33|22}}
| dec = {{DEC|+61|26|36}}
| dist_ly =  7,500
| appmag_v = 18.3
| size_v = 150' x 150'
| constellation  = [[Cassiopeia (constellation)|Cassiopeia]]
| radius_ly = 165
| absmag_v = 6.5
| notes = 
<!--invalid parm age_myr = 2 ± 1 -->
| names = [[New General Catalogue|NGC]] 896, [[IC1805]], [[Sharpless Catalog|Sh2-190]]
}}

The '''Heart Nebula''' (also known as the '''Running dog nebula''', '''IC 1805''', '''Sharpless 2-190''') is an [[emission nebula]], 7500 [[light years]] away from [[Earth]] and located in the [[Perseus Arm]] of the [[Milky Way|Galaxy]] in the constellation [[Cassiopeia (constellation)|Cassiopeia]]. It was discovered by [[William Herschel]] on 3 November 1787.<ref name="cseligman">{{Cite web|url=http://cseligman.com/text/atlas/ngc8a.htm#896|title=New General Catalog Objects: NGC 850 - 899|website=cseligman.com|language=en-US|access-date=2017-12-19}}</ref> It displays glowing ionized [[hydrogen]] gas and darker [[dust lane]]s.<ref name="astronomymall">{{Cite web|url=http://www.astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm|title=astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm|website=astronomy-mall}}</ref>

The brightest part of the nebula (a knot at its western edge) is separately classified as NGC 896, because it was the first part of the nebula to be discovered. The nebula's intense [[red]] output and its morphology are driven by the radiation emanating from a small group of stars near the nebula's center. This [[open cluster]] of stars, known as [[Collinder catalogue|Collinder]] 26 or [[Melotte catalogue|Melotte]] 15, contains a few bright stars nearly 50 times the mass of the Sun, and many more dim stars that are only a fraction of the Sun's mass.<ref name="cseligman"/>

The Heart Nebula is also made up of ionised oxygen and sulfur gasses, responsible for the rich blue and orange colours seen in narrowband images. The shape of the nebula is driven by stellar winds from the hot stars in its core. The nebula also spans almost 2 degrees in the sky, covering an area four times that of the diameter of the full moon.<ref>{{Cite web|title=The Heart Nebula in Hydrogen, Oxygen, and Sulfur {{!}} Science Mission Directorate|url=https://science.nasa.gov/heart-nebula-hydrogen-oxygen-and-sulfur|access-date=2021-12-30|website=science.nasa.gov}}</ref>

== Gallery ==
<gallery>
File:Heart Nebula.jpg|[[File:HeartNebulaDec2022.jpg|border|none|thumb|This image of the Heart Nebula is composed of 7 hours of RGB data collected in December 2021 by Keith Steffens at the Frog Island Observatory in Escanaba, Michigan.]]
File:Heart Nebula Hubble Palette.jpg|[[File:IC 1805 The Heart Nebula.png|thumb|Heart Nebula captured on AT80ED on ASI294MC Pro with dualband filter. Captured 12-12-23 in North Carolina by Samantha Pickard]]Heart Nebula captured in Ha, Sii and Oiii Hubble Palette
File:Heart-nebula.jpg|Heart Nebula captured on an ASI2600mc-pro with a Triad Narrowband Filter
File:PerseusChimneymap.png|Heart Nebula and [[Soul Nebula]] are part of a [[Soul Nebula#Star formation|large chimney cloud complex]]
File:Melotte15.jpg|Melotte 15 is part of Heart Nebula.  There are several bright stars here, some of them nearly 50 times mass of the Sun. Telescope: 14" SCT Imager: Raman Madhira from Ray's Astrophotography Observatory; Postprocessing with PixInsight. Imaged on 2022-09-21
File:Heart-nebula-sept-2022.png|alt=Captured from Manchester September 2022  Bortle class 8 sky |Captured from Manchester September 2022  Bortle class 8 sky
</gallery>

== See also ==
* [[Soul Nebula]]
* [[List of NGC objects (1–1000)]]

== References ==
{{Reflist}}

==External links==
{{commons category|IC 1805}}
*[https://rockchucksummit.com/the-heart-nebula-ic-1805-sharpless-2-190/ Heart Nebula Data download & Processing Guide]
*[http://www.atlasoftheuniverse.com/nebulae/ic1805.html Heart Nebula at Atlas of the Universe]
*{{APOD |date=14 February 2009 |title=Heart Nebula}}


{{Sh2 objects}}
{{Ngc10}}
{{Catalogs|IC=1805|NGC=896}}
{{Cassiopeia (constellation)}}
{{Sky|02|33|00|+|61|27|00|7500}}

[[Category:NGC objects]]
[[Category:Cassiopeia (constellation)]]
[[Category:H II regions]]
[[Category:Perseus Arm]]
[[Category:Sharpless objects]]
[[Category:IC objects]]
[[Category:Discoveries by William Herschel]]
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