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Home , Aldebaran, Aldebaran b, Double star, Epsilon Tauri

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Aldebaran is the brightest in the . It is the fourteenth-brightest star in the and it is believed to host a nicknamed . Since the star is visible to the , many cultures and civilizations have recorded Aldebaran and attributed the star with many different myths and religious symbolism. Aldebaran has evolved off the stage of its life and exhausted Aldebaran: Group v. 2 supply of fuel in its core. Because of this, the star has brightened and expanded its radius. The origin of Aldebaran is still a mystery to scientists. It is speculated that it formed around 6. Its origins remain unknown to this . It is thus around 44 times bigger than our . Though it is much bigger than our sun, it has only 1. This small variability cannot be seen with the naked eye, but it puts Aldebaran in the low irregular type LB . Since its core collapsed into a degenerate core, it has ignited a shell of hydrogen outside its core. Aldebaran is losing its at about one entire per This creates an extended molecular outer atmosphere where the are cool enough for molecules of gas to form. This region Aldebaran: Group v. 2 2. Outside this sphere, its stellar winds continue to expand forming a roughly spherical astrosphere of around 1. It is rumored that Aldebaran has an named Aldebaran b. This planet is supposed to be several times Aldebaran: Group v. 2 than . In however, more arduous observations and analysis put the existence of the exoplanet in serious doubt. It is now suggested that in order for the data to be accurate, Aldebaran would need to have 2 or none at all. Observations still continue to this day in order to end this dispute. Aldebaran is located in the constellation of Taurus. It is the brightest Aldebaran: Group v. 2 in the constellation and appears to be part of the cluster when viewed from Earth. Though it appears Aldebaran: Group v. 2 be part of the Hyades cluster, modern measurements show that it is actually in a different region of space. The Hyades cluster is around 60 light- farther away from Aldebaran. The Taurus constellation is one of the oldest documented . Its origins stretch back Aldebaran: Group v. 2 least as far as the Bronze Age. Aldebaran seems to have five faint stars which appear close to it. Analysis suggests that these stars are not bound to Aldebaran but some of them are binary stars. Though the probe is set on a route towards Aldebaran, it will reach the star in around 2 million years. Before this, the star Aldebaran: Group v. 2 continue to expand in size and and eventually, it will become a full-fledged that will be over times as bright as the sun. The left eye is marked Aldebaran: Group v. 2 the star. It was known to them as Tascheter. The German conspiracy theorist Axel Stoll considered the star the home of the Aryan race and the target of expeditions by the Wehrmacht. The star varies slowly in brightness between 0. This cannot be seen through the naked eye though. Thus Aldebaran is a slightly assigned to the low irregular type LB. Aldebaran hosts a star named Aldebaran b which is several times the mass of Jupiter. Aldebaran is over times as luminous as our sun, but it is way cooler. It has a surface of 3. It has a radius of about 44 times that of the sun. Aldebaran completes a rotation in about days. The star has a surface of 1. Aldebaran has a magnetic field strength of around 0. The probe Pioneer 10 is headed Aldebaran: Group v. 2 the general direction of Aldebaran. Aldebaran is around 6. Since the star is 5. Due to its position Aldebaran: Group v. 2 the sky, Aldebaran is sometimes called the Eye of Taurus. Aldebaran / Alpha Tauri 2

It is the brightest star in Taurus and generally the fourteenth-brightest star in the night sky, though it varies slowly in brightness between magnitude 0. Aldebaran is believed to host a planet several times the mass of Jupiternamed Aldebaran b. It spins slowly and takes days to complete a rotation. The planetary exploration probe Pioneer 10 is heading in the general direction of the star and should make its closest approach in about two million years. It has the 87 Tauri as the 87th star in the constellation of approximately 7th magnitude or brighter, ordered by . It also has the Bright numberthe HD numberand the Hipparcos catalogue numbermostly seen in scientific publications. It is a variable star listed in the General Catalogue of Variable Starsbut it is listed using its and does not have a separate variable star designation. Aldebaran is one of the easiest stars to find in the night skypartly due to its brightness and partly due to being near one Aldebaran: Group v. 2 the more noticeable asterisms in the sky. Following the three stars of 's belt in the opposite direction to Siriusthe first bright star encountered is Aldebaran. The star is, by chance, in the line of sight between the Earth and the Hyadesso it has the appearance of being the brightest member of the open clusterbut the cluster that forms the bull's-head-shaped is more than twice as far away, at about light years. Aldebaran Aldebaran: Group v. 2 5. Such occur when the 's ascending node is near the autumnal equinox. Australia or South Africa can never Aldebaran: Group v. 2 an Aldebaran since it is too far south of the . A reasonably accurate estimate for the diameter of Aldebaran was obtained during the occultation of 22 September This, as well as observations of the changing positions of stars and Arcturusled to the discovery of . This star was shown to be itself a close by S. Follow on measurements of proper motion showed that Herschel's companion was diverging from Aldebaran, and hence they were not physically connected. However, the companion discovered by Burnham had almost exactly the same proper motion as Aldebaran, suggesting that the two formed a wide system. Working at his private observatory in Tulse HillEnglandin performed the first studies of the spectrum of Aldebaran: Group v. 2, where he was able to identify the lines of nine elements, including ironsodiumcalciumand . InEdward C. Pickering at the Harvard College Observatory used a photographic plate to capture fifty absorption lines in the spectrum of Aldebaran. This became part of the Draper Cataloguepublished in Bythe photographic technique had improved to the point that it was possible to measure a star's from the amount of Doppler shift in the spectrum. Vogel and his assistant Julius Scheiner. Aldebaran was observed using an interferometer attached to the Hooker Telescope at the in in order to measure its Aldebaran: Group v. 2, but it was not resolved in these observations. The extensive history of observations of Aldebaran led to it being included in the list of 33 stars chosen as benchmarks for the mission to calibrate derived stellar parameters. The collapse of the centre of the star into a degenerate helium core has ignited a shell of hydrogen outside the core and Aldebaran is now on the red giant branch RGB. It has a of 1. Measurements by the Hipparcos satellite and other sources put Aldebaran around The angular diameter of Aldebaran has been measured many times. The value adopted Aldebaran: Group v. 2 part of the Gaia benchmark calibration is Aldebaran is a slightly variable starassigned to Aldebaran: Group v. 2 slow irregular type LB. The General Catalogue of Variable Stars indicates variation between 0. The shows abundances of carbonoxygenand that suggest the giant has gone through its first dredge-up stage—a normal step in the evolution of a star into a red giant during which material from deep within the star is Aldebaran: Group v. 2 up to the surface by convection. However, small scale magnetic fields may still be present in the lower atmosphere, resulting from convection turbulence near the surface. The measured strength of the magnetic field Aldebaran: Group v. 2 Aldebaran is 0. Beyond the of Aldebaran is an extended molecular outer atmosphere MOLsphere where the temperature is cool enough for molecules of gas to form. This region lies at about 2. The spectrum reveals lines of monoxidewaterand . Five faint stars appear close to Aldebaran in the sky. These double star components were given upper-case Latin letter designations more or less in the order of their discovery, with the letter Aldebaran: Group v. 2 reserved for the primary star. Some characteristics of these components, Aldebaran: Group v. 2 their position relative to Aldebaran, are shown in the table. Some surveys, for example Gaia Data Release 2[44] have indicated that Alpha Tauri B may have about the same proper motion and as Aldebaran and thus may be a physical binary system. These measurements are difficult, since the dim B component appears so close to the bright primary star, and the margin of error is too large to establish or exclude a physical relationship between the two. So far neither the B component, nor anything else, has been unambiguously shown to be physically associated with Aldebaran. Alpha Tauri CD is a binary system with the C and D component stars gravitationally bound to and co-orbiting each other. These co-orbiting stars have been shown to be located far beyond Aldebaran and are members of the Hyades . As with the rest of the stars in the cluster they do not physically interact with Aldebaran in any way. In radial velocity measurements Aldebaran: Group v. 2 Aldebaran, and showed that Aldebaran exhibited a long-period radial velocity oscillation, which could be interpreted as a substellar companion. The measurements for Aldebaran implied a companion with a minimum mass However, all three stars surveyed showed similar oscillations yielding similar companion , and the authors concluded that the variation was Aldebaran: Group v. 2 to be intrinsic to the star rather than due to the gravitational effect of Aldebaran: Group v. 2 companion. In Aldebaran: Group v. 2 study showed stable long-term evidence for both a planetary companion and stellar activity. This easily seen and striking star in its suggestive asterism is a popular subject for ancient and modern myths. It is frequently seen in science fictionincluding the Lensman series and Fallen Dragon. As the brightest star in a Zodiac constellation, it is also given great significance within . Aldebaran regularly features in conspiracy theories as one of the origins of extraterrestrial aliens[55] often linked to Nazi UFOs. The planetary exploration probe Pioneer 10 is no longer powered or in contact with Earth, but its trajectory is taking it in the general direction of Aldebaran. It is expected to make its closest approach in about two million years. Coordinates : 04 h 35 m From Wikipedia, the free encyclopedia. Not to be confused with Alderamin or Alderaan. For other uses, see Aldebaran Aldebaran: Group v. 2. For the fashion company, see AlphaTauri fashion brand. Aldebaran in the Taurus constellation. Main article: Aldebaran b. Oxford Dictionary. Retrieved Astronomy and Astrophysics. General Catalogue of Variable Stars. Bayesian stellar parameters and evolutionary stages for giant stars from the Lick planet search". The Astrophysical Journal Supplement Series. Bibcode : ApJS Originally Published in: yCat. Bibcode : yCat. Revisiting the concept of superclusters". The Astronomical Journal. Bibcode : AJ The Astrophysical Journal. Bibcode : ApJ Archived from the original PDF on Gaia benchmark stars and other M-K standards". The Mythology of the Night Sky. Patrick Moore's Practical Astronomy Series. Allen 28 February Star Names: Their Lore and Meaning. Courier Corporation. Retrieved 28 July Retrieved 22 May Burnham from toarranged in order of Right Ascension". Publications of the Yerkes Observatory. Bibcode : PYerO Firefly Books. The Monthly Sky Guide. Cambridge University Press. Journal of the British Astronomical Association. Bibcode : JBAA June The Observatory. Bibcode : Obs Aldebaran - Wikipedia

Aldebaran is the brightest star in the constellation Taurus and is known as the "Eye of Taurus. The K is slightly larger than our sun, at 1. Aldebaran is older and redder than the sun and preparing Aldebaran: Group v. 2 fuse its lightweight core into heavier elements, which is common among stars of its type. Aldebaran: Group v. 2 has a surface temperature of about 6, F 3, C and glows red, similar to Mars — which occasionally passes by the star in the night sky. Because the star's luminosity Aldebaran: Group v. 2 well understood, it is sometimes used for comparative astronomy. Infor example, the Cassini spacecraft gazed at Aldebaran through the rings of Saturn to learn more about ring particle concentrations. The star was noted and named in Chinese, Roman and Hindu astronomy, among other cultures. Aldebaran would have been hard to miss for the ancients, given that Taurus is very visible in the winter. The bull, in fact, is one of the oldest documented constellations. Its origins stretch back at least as far as the Bronze Age. At 65 light-years away, the star is practically a neighbor to Earth. Its apparent magnitude is about 0. Aldebaran's location is:. The star is often covered or occulted by the moon, since it lies close to the path of the ecliptic path of the sun, moon and in the sky. Because of occultation, it is relatively easy to get a rough idea of the star's size by estimating the time it is covered, as well as observing it in different locations. Calculations show it's about 44 times the size of the sun. While Aldebaran appears to be part of the Hyades cluster when viewed from Earth, modern measurements show that it is actually in a different region of space altogether. Astronomers occasionally use bright stars as guideposts to increase their understanding of other objects. One example took place during the Cassini mission inwhen the spacecraft took a series of images of Aldebaran Aldebaran: Group v. 2 Saturn's rings. Another past project used Aldebaran to map the moon. Join our Space Forums to keep talking space on the latest missions, night Aldebaran: Group v. 2 and more! And if you have a news tip, correction or comment, let us know at: community space. Please deactivate your ad blocker in order to see our subscription offer. On the morning of Sunday July 15,the planets and Jupiter joined with the red giant star Aldebaran and the waning crescent moon in a quadruple . The star Aldebaran: Group v. 2 is nearby. Locating Aldebaran The star was noted and named in Chinese, Roman and Hindu astronomy, among other cultures. Aldebaran's location is: Right ascension : 04 hours 35 minutes Aldebaran as a guidepost Astronomers occasionally use bright stars as guideposts to increase their understanding of other objects.