Planetary nebula and globular cluster in
Sagittarius. It makes for interesting observing when
two different types of deep sky objects can be seen in the same telescopic
field. The Box Nebula is a fairly
small planetary nebula with a curious rectangular shape. It is also sometimes called the Little
Gem Nebula, and it does have a bit of a gem-like appearance in this photo. This object is about 4500 light years
away. Just 22 minutes of arc to its
south (to the left in this picture) is the distant globular cluster NGC
6440. (As a point of comparison,
the apparent diameter of the moon is about 30 minutes of arc).