IMAGING TARGETS by Ron Brecher
22 JUNE 2020 • SKY & TELESCOPE
Sharpless
Catalog
of the
Treasures
NEBULOUS SPLENDOR
The Sharpless Catalog was
the fi rst exclusive listing of
emission nebulae visible from
the Northern Hemisphere.
Many of the nebulae listed as
several objects in earlier cata-
logs are grouped as single,
larger objects. For example,
NGC 7000 (top left) and
IC 5070 (right) are together
listed as Sh 2-117.