Photo by Pittendreigh
HOW TO FIND IT:
Move 1 to 2 degrees north of M8 and you will come across another spectacular object.
You might think that you are able to see M20 with the unaided eye, but what you actually see are the many stars and clusters in that area.
WHAT TO LOOK FOR:
Why M20 is called the Trifid Nebula will become obvious when you see it. It has three dark lanes intersecting in the middle of the nebula.
It may be a bit disappointing in a smaller telescope, such as a 4 inch. An 8 inch shows it quite well. You can, however, see the nebula in a pair of binoculars.
M21 is a bright, open cluster that is somewhat compact.