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The Pleiades, or The Seven Sisters, is an open star cluster containing hot, young stars of spectral type B, located in the constellation of Taurus. It is among the closest star clusters to Earth and is the most visible cluster in the night sky with the naked eye. The Pleiades hold a prominent place in ancient mythology, as well as a variety of meanings in different cultures and traditions. The cluster is dominated by extremely luminous, hot, blue stars that have formed within the last 120 million years. The cluster is about 12 light-years across and contains a total of approximately 500 to 1,000 stars. It is dominated by young blue stars, eight of which can be observed with the naked eye depending on atmospheric conditions. The cluster is largely composed of brown dwarfs—objects with less than 8% of the Sun's mass—which are too light to be stars. These objects may make up approximately 25% of the cluster's total population, even though they only contribute 2% of its total mass. Also present in the cluster are white dwarfs, which contradict the cluster's estimated age. Due to the cluster's young age, normal stars are not expected to have evolved into white dwarfs. It is thought that, rather than being individual stars of low or medium mass, the progenitors of these stars were massive and orbited in binary systems. During their rapid evolution, the transfer of mass from the more massive star to its companion may have accelerated their evolution into a white dwarf. It has been estimated that the Pleiades have a future of only another 250 million years; by then, they will have been separated as individual (or multiple) stars along their paths. They are known in many places around the world as the Seven Sisters. But if you look closely, you will see that it actually contains six stars. What happened to the seventh? Why is it called that? Many cultures around the world tell quite similar stories about the Seven Sisters. It has been suggested that perhaps the first stories about the Pleiades originated 100,000 years ago. At that time, the constellation had a very different appearance than we see today. In Greek mythology, the Pleiades were the seven daughters of the Titan Atlas. He was forced to guard the sky for all eternity, preventing him from protecting his daughters. So, to prevent them from being raped by Orion, the hunter, Zeus transformed them into stars. The story goes, however, that one sister fell in love with a mortal and decided to hide. That's why we can only see six stars in the firmament. Another similar story is told among the Aboriginal groups of Australia. There is also much talk about the Nordic extraterrestrials (also known as the "space brothers"), or simply Pleiadians. They are a hypothetical race of extraterrestrials described by some people who claim to have been contacted by them. Among these contactees is the controversial Billy Meier, one of the first to claim the reality of these beings' visits to our planet. Since the 1980s, more and more contactees have been appearing all over the world, among them the American Barbara Marciniak who has published several books, the Argentine Áditi Prem who constantly contacts these beings during her Akashic record readings, and the best known today, the American Michael Love, main channeler of the Pleiadians since 2015. Music: https://www.purple-planet.com "Moonrise" "A new world" "Secret Escapes" "Troposphere" Credit: ALMA (ESO/NAOJ/NRAO)/NASA/ESA/N. Risinger (skysurvey.org). Music: movetwo https://www.eso.org/public/spain/vide... Credit: ESO/L. Calçada Credit: ESO/Exeter/Kraus et al./L. Calçada Credit: Mark Garlick (www.markgarlick.com) and University of Warwick/ESO Credit: ESO/M. Kornmesser Credit: ESO/L. Calçada/University of Warwick Credit: ESO/Digitized Sky Survey 2/N. Risinger (skysurvey.org). Music: movetwo Credit: ESO/L. Calçada, INAF-Padua/S. Zaggia