The Antennae Galaxies
(sometimes called the Ringtail
Galaxy) was formed by the
collision of two spiral galaxies
(NGC4038 and NGC4039)
some 63 million light years
from Earth (located in the
direction of Corvus -- the
"Raven" constellation -- in the
southern sky). It is surmised
that an increase in the density
of interstellar gas at the time of
the collision gave birth to
countless new star clusters.

This image was chosen as the
APOD (Astronomy Picture of
the Day) for May 7, 2010.  
Click
here to see the archived
APOD.
16" RCOS @ f/11.3
Apogee U9 imager
SBIG 402 guider
Astrodon Series I LRGB

LRGB:

L=  7
hours, 1x1
R=  3
hours, 1x1
G=  3
hours, 1x1
B=  3
hours, 1x1

Data acquired at
CTIO

Processed with CCD
Inspector
, PixInsight,
and Adobe Photoshop.
 NGC 4038/39 -- Antennae Galaxies
      
    Click on image to enlarge