The Pleiades is an open star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology. The Pleiades is a white star cluster that is roughly 500 light years from Earth.
Blue Blood Origin. The term blue blood originated in Spain. It was used to differentiate between people with light skin from those with darker complexions. The veins of southern Europeans appeared more blue due to their pale and translucent skin. Wealthy landowners or their descendents were part of an upper class in Spain that were called blue-bloods or blue-blooded.
Blue Blood. Drug slang A regional term for a person who injects drugs intravenously. Vox populi A person who has descended from nobility (from the Spanish phrase sangre azul), referring specifically to those who trace their roots to Spanish royalty. The term refers to the paler skin of said descendants, whose veins appear a deep blue due to the Tyndall effect. 1  Facebook.