Find here the 15 brightest star clusters you can see without any special equipment. Observing deep-sky objects is easier than you think!
Star cluster - Wikipedia
Star Clusters Names, Globular Cluster vs Open Cluster, Famous Star Clusters, Hyades
From EarthSky: “What are 'open' star clusters?” – sciencesprings
Star Clusters
MOND: Crooked star clusters may be a sign that Einstein's gravity is wrong
Best constellations in the night sky, season-by-season - BBC Sky at Night Magazine
The Five Daughters of Atlas - The Hyades Star Cluster - Farmers' Almanac - Plan Your Day. Grow Your Life.
5 star clusters to see with the naked eye - BBC Sky at Night Magazine
How to spot the Hyades, the closest star cluster to Earth
The Closest Black Holes To Earth Could Be Inside Famous Hyades Star Cluster
Star cluster - Wikipedia
What is the difference between open clusters and globular clusters?
The Different Types Of Star Clusters - WorldAtlas
What is an Open Star Cluster? Facts, Pictures, and Examples