The Crab Nebula, about 6,500 light years from Earth, is the scattered fragments of a supernova, or exploding star. Earthly skywatchers observed it in AD 1054.
The Wild Duck Cluster (Messier 11) is found in the constellation Scutum the Shield, just south of the Eagle’s Tail in the constellation Aquila. Unless you have eagle eyes, don’t expect to see this distant star cluster with the eye alone. Starting from the star Altair, star-hop to M11’s general location. Then find it with binoculars!