|Where do stars form when galaxies collide?
To help find out, astronomers imaged the nearby galaxy merger
NGC 2623 in high resolution with the
Hubble Space Telescope in 2007.
Analysis of this Hubble image and images of
NGC 2623 in
infrared light by the
Spitzer Space Telescope, in
X-ray light by
XMM-Newton, and in
ultraviolet light by
indicate that two originally
spiral galaxies appear now to be
greatly convolved and that their cores have unified into one
active galactic nucleus (AGN).
Star formation continues around this core near the
above image center, along the stretched out
tidal tails visible on either side,
and perhaps surprisingly, in an off-nuclear region on the upper left where