Extending outward from its bright central
bar, the four principle arcing spiral arms of the nearly face-on
spiral NGC 1672 are heavily populated with scores of young stars
and their ionized nebulae. The immense central bar extends some
20kpc end to end. At its center is a powerful cosmic furnace known
as an "active nucleus". "Active" galaxies
are luminous galaxies known to release copious amounts of energy
from their nucleus which cannot be solely accounted for by stellar
processes. NGC 1672 belongs to the subtype known as Seyfert galaxies
(named after Carl Keenan Seyfert who studied them in the 1940s)
and have an extremely bright starlike nucleus which can at times
outshine the entire parent galaxy. The light emitting region is
often compact, spanning less than 1 light year in diameter. The
enormous energy output is likely powered by the accretion of matter
into a massive "Black Hole". The Seyfert nucleus of
NGC 1672 is surrounded by a brilliant nuclear starburst ring.
Central bars are thought to contribute to local star formation
by funneling gas centrally into the nucleus. Scattered around
the image are dozens of faint distant galaxies, their light attenuated
and reddened by distance and dust. Amazingly a few appear to shine
brightly through the disk itself.