This section of our Milky Way is
one of the closest (at 425 light years away) star-forming regions.
It covers 4.5 x 6.5 degrees in our sky. Antares (alpha Scorpii)
is the bright yellow star at the lower right. It is approximately
550 light years away. The globular star cluster to its right is
M 4. It lies 7 thousand light years away from us.
Rho Ohphiuchus is a binary star
system seen at the upper right of the frame. It lies 360-450 light
years away. The blue nebulosity surrounding it is designated as
IC 4604. The yellow nebula surrounding Antares is IC 4606 while
the red nebula to the far right is Sh2-9 (aka Lynds 1688). This
surrounds Sigma Scorpii. Finally, the long dark nebula streaming
to the left of the image is B44. It is often referred to as the
Dark River Nebula.