Hubble’s Hidden Galaxy

IC 342 is a challenging cosmic target. Although it is bright, the galaxy sits near the equator of the Milky Way’s galactic disc, where the sky is thick with glowing cosmic gas, bright stars, and dark, obscuring dust. In order for astronomers to see the intricate spiral structure of IC 342, they must gaze through a large amount of material contained within our own galaxy — no mean feat! As a result IC 342 is relatively difficult to spot and image, giving rise to its intriguing nickname: the “Hidden Galaxy”.

Located very close (in astronomical terms!) to the Milky Way, this sweeping spiral galaxy would be among the brightest in the sky were it not for its dust-obscured location. The galaxy is very active, as indicated by the range of colours visible in this NASA/ESA Hubble Space Telescope image, depicting the very central region of the galaxy. A beautiful mixture of hot, blue star-forming regions, redder, cooler regions of gas, and dark lanes of opaque dust can be seen, all swirling together around a bright core. In 2003, astronomers confirmed this core to be a specific type of central region known as an HII nucleus — a name that indicates the presence of ionised hydrogen — that is likely to be creating many hot new stars.

 

Credit:

ESA/Hubble & NASA

About the Image

Id:potw1727a
Type:Observation
Release date:3 July 2017, 06:00
Size:497 x 503 px

About the Object

Name:IC 342
Type:Local Universe : Galaxy
Distance:11 million light years
Constellation:Camelopardalis
Category:Galaxies

Image Formats

Large JPEG
163.9 KB
Screensize JPEG
282.2 KB

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304.7 KB
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751.3 KB

Coordinates

Position (RA):3 46 48.55
Position (Dec):68° 5' 46.21"
Field of view:0.33 x 0.33 arcminutes
Orientation:North is 10.2° left of vertical

Colours & filters

BandWavelengthTelescope
Ultraviolet
UV
275 nm Hubble Space Telescope
WFC3
Optical
U
336 nm Hubble Space Telescope
WFC3
Optical
B
438 nm Hubble Space Telescope
WFC3
Optical
y
547 nm Hubble Space Telescope
WFC3
Optical
I
814 nm Hubble Space Telescope
WFC3

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