The most well-known open cluster is probably the Pleiades, or Seven Sisters. The Japanese call it the Subaru cluster, and keen observers might recognize its pattern on the Subaru automobile logo. Image: By NASA, ESA, AURA/Caltech, Palomar Observatory. http://hubblesite.org/newscenter/archive/releases/2004/20/image/a/, Public Domain, https://commons.wikimedia.org/w/index.php?curid=7805481