Find here the 15 brightest star clusters you can see without any special equipment. Observing deep-sky objects is easier than you think!
Star Clusters
Stars: Facts about stellar formation, history and classification
What Constellations Are Visible With The Naked Eye Astronimus
Old, Dense Star Clusters Might Be the Place to Look for Complex Alien Life, Smart News
Pleiades Star Cluster Names
Open versus Globular Star Clusters
Introduction to Globular Clusters - Bintel
Pleiades Star Cluster Names
Globular cluster - Wikiwand