Credit: ESA/Hubble & NASA
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.
Source: ESA/Hubble/Potw
