It's called Aldebaran and its name was, like so many other star names, based in mythology. Some texts include Aldebaran here, but really he is separate from the rest of the cluster and needs to be read separately also. Even though these two star clusters are separated from one another by hundreds of light-years, they are akin in age and travel in a similar direction in space. Therefore, Aldebaran in no way interact with the Hyades, is not considered to be part of the asterism, and its exact origins remain unknown, since it cannot be linked to any structure, cloud, or group of stars. Enjoying EarthSky? Hyades definition, a group of stars comprising a moving cluster in the constellation Taurus, supposed by the ancients to indicate the approach of rain when they rose with the sun. This is also known as a minor lunar standstill . This is what we call a “line-of-sight coincidence”. Aldebaran definition is - a red star of the first magnitude that is seen in the eye of Taurus and is the brightest star in the Hyades. Although Aldebaran isn’t a true member of the Hyades star cluster, this bright star is a great guide to this cluster. Aldebaran is close… just over 60 light years away. As most open clusters dissolve before they reach a billion years in age, the Hyades are expected to lose members and mass over the next few hundred million years until they are reduced to about a dozen star systems, which will eventually dissipate, too. The Hyades star cluster is in the face of Taurus the bull, spanning 5 to 9 degrees Gemini. Image Credit: Duncan Moran. Fixed star Aldebaran, Alpha Tauri, is a 0.9 magnitude giant orange star in the Left Eye of the Bull, Taurus Constellation. That’s why Aquarius and Leo do not appear in the same sky together. Its apparent proximity to the cluster is only an optical illusion. Aldebaran is one of the easiest stars to find in the night sky, partly due to its brightness and partly due to being near one of the more noticeable asterisms in the sky. Right in the center of Taurus the Bull is the bright orange giant Aldebaran. Although the Hyades and Pleaides are half-sisters in mythology, science finds no close relationship in space between these two star clusters. Beehive cluster (M44), a naked-eye open star cluster toward the The gods transformed Hyas into the constellation Aquarius, and the lion that killed him into the constellation Leo. The Hyades consist of Theta 1 (θ 1) Taurus, theta 2 (θ 2) Taurus, gamma (γ, Prima Hyadum) Taurus, delta (δ Hyadum11) Taurus, and epsilon (ε Ain) Taurus. A dozen or more Hyades stars are visible to the unaided eye in a dark country sky, but several dozen of the cluster’s stars can be resolved through binoculars or low power in a telescope. Aldebaran is about 65 light-years away, much closer than the stars of the Hyades with which it misleadingly seems associated. The Hyades cluster has very few stars at both extremes of mass and its main sequence turn-off is about 2.3 solar masses. From Earth, the bright red giant star Aldebaran looks to be a part of the cluster, but it is actually much closer to Earth than the Hyades, at 65 light years away. The face of Taurus is marked by the V-shaped group of stars called the Hyades. The Hyades are about 150 light-years away. n. A binary star in the constellation Taurus, 68 light years from Earth, and one of the brightest stars in the sky. The Sun passes through these degrees around May 26 to 30 each year. The small dipper-shaped Pleiades star cluster is nearby. The Hyades are about 150 light-years away. The Hyades are estimated to be about 625 million years old. To find the Hyades, look in the eastern sky for the familiar constellation Orion, or the open star cluster Pleiades. 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