Aftermath of a Cosmic Collision: NGC4490 and NGC4485 (Arp269) (Bruce Donzanti)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: NGC 4485 · NGC 4490

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Aftermath of a Cosmic Collision: NGC4490 and NGC4485 (Arp269)

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Aftermath of a Cosmic Collision: NGC4490 and NGC4485 (Arp269)

Discovered by William Herschel in 1788, both of these interacting galaxies are listed together as Arp 269. As the story goes (or rather as the data suggest), NGC4490 was once a barred spiral galaxy. After colliding with NGC4485, NGC4490 had its arms stretched into a chrysalis shape, leading to its nickname the Cocoon Galaxy. NGC 4485 was also once a spiral galaxy. However, it was so warped by the interaction that any trace of its former self has been erased, and it now lags behind as the two galaxies slowly separate. Hubble images reveal a trail of bright stars and HII extending 24,000 light-years back toward NGC 4490. These galaxies lie about 25 million light-years from Earth and are now rushing away from each other.

Despite my image not having great clarity, due to my sky conditions, you can still see remnants of a stellar stream which is 25,000 light years long that connects the two interacting galaxies. The stellar stream is made of bright knots and large gas rich pockets. Young blue hot massive stars are formed in this region. I find the subject of interactive galaxies one of the most fascinating to read about, as our future collision with Andromeda lies ahead.

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Status	Advanced success
Started	...
Astrometry.net job	9668666
PixInsight job	LDXY0U267C03N0THE9MMY19DBSNF5K0T
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h30m32s.348
RA (top/left)	12h29m08s.379
RA (top/right)	12h31m11s.250
RA (bottom/right)	12h31m56s.482
RA (bottom/left)	12h29m53s.587

Dec (center)	+41°38′33″.92
Dec (top/left)	+41°37′30″.95
Dec (top/right)	+41°24′35″.78
Dec (bottom/right)	+41°39′34″.64
Dec (bottom/left)	+41°52′33″.14

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Aftermath of a Cosmic Collision: NGC4490 and NGC4485 (Arp269)

Aftermath of a Cosmic Collision: NGC4490 and NGC4485 (Arp269)

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Aftermath of a Cosmic Collision: NGC4490 and NGC4485 (Arp269)

Aftermath of a Cosmic Collision: NGC4490 and NGC4485 (Arp269)

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