[73] Thus, in terms of abundances, only about 0.54% of Vega consists of elements heavier than helium. However, images by the Keck telescope had ruled out a companion down to magnitude 16, which would correspond to a body with more than 12 times the mass of Jupiter. The Summer Triangle is recognizable in the northern skies for there are few other bright stars in its vicinity. projected) rotational velocity because Vega is seen almost pole-on. What is the meaning of vega? It is now so entered in the IAU Catalog of Star Names. Through precession, the pole will again pass near Vega around AD 14,000. From Earth, Vega is observed from the direction of one of these poles. [116], Medieval astrologers counted Vega as one of the Behenian stars[117] and related it to chrysolite and winter savory. Vega’s spectral type is A (white) and its luminosity class V (main sequence). Helmenstine, Anne Marie, Ph.D. "Vega Star Facts on Our Future North Star." [55] The current age of this star is about 455 million years,[11] or up to about half its expected total main-sequence lifespan. The inclination of planetary orbits around Vega is likely to be closely aligned to the equatorial plane of this star. With the viewing angle and rotation rate of Vega now better known, this will allow improved instrument calibrations.[72]. Right now, Vega is about 455 million years old or half-way through its main-sequence life. The brightest star in the constellation Lyra, approximately 26 light years from Earth. User Submitted Meanings. Disclaimer At Kidadl we pride ourselves on offering families original ideas to make the most of time spent together at home or … When Vega is the pole star, a long exposure photograph would show stars circling it. borrowed from Medieval Latin Wega, Vega, altered from the terminal syllables of Arabic al-nasr al-wāqiʽ, literally, "the descending eagle," originally a name applied to the three stars α, β and γ Lyrae. Vega Star Facts on Our Future North Star. The migration of this planet would likely require gravitational interaction with a second, higher-mass planet in a smaller orbit. Many allow you to wave the phone across the sky until you see the name. At the high end of estimates for the rotation velocity for Vega is 236.2 ± 3.7 km/s[11] along the equator, much higher than the observed (i.e. [112], In Zoroastrianism, Vega was sometimes associated with Vanant, a minor divinity whose name means "conqueror". Other stars that display excessive dust when viewed in the infrared spectrum are called Vega-like or Vega-excess stars. [11]) From the Earth, this bulge is being viewed from the direction of its pole, producing the overly large radius estimate. [32], Astrophotography, the photography of celestial objects, began in 1840 when John William Draper took an image of the Moon using the daguerreotype process. [82] The estimated age of this moving group is 200 ± 100 million years, and they have an average space velocity of 16.5 km/s. ThoughtCo, Aug. 28, 2020, thoughtco.com/vega-star-facts-4137641. Vega is a variable star thus it changes its brightness; Our Sun rotates on its axis in about 28 days, Vega, on the other hand, rotates much faster – once every 12 and a half hours, with a speed of 236 km/ 146.6 mi per second at the equator. The estimated total mass of this dust is 3×10−3 times the mass of the Earth (around 7.5 times more massive than the asteroid belt). [108], The Assyrians named this pole star Dayan-same, the "Judge of Heaven", while in Akkadian it was Tir-anna, "Life of Heaven". As a result, content that stays on the FANDOM domain … [23], By 2005, the Spitzer Space Telescope had produced high-resolution infrared images of the dust around Vega. Thus the velocity can be measured from the amount of shift of the star's spectrum. 0. Immersives VR-Erlebnis. This is the first such detection of a magnetic field on a spectral class A star that is not an Ap chemically peculiar star. [36], The distance to Vega can be determined by measuring its parallax shift against the background stars as the Earth orbits the Sun. On July 17, 1850, Vega became the first star (other than the Sun) to be photographed, when it was imaged by William Bond and John Adams Whipple at the Harvard College Observatory, also with a daguerreotype. Vega has a dreamy temperament and is often entranced by the constellations in the night sky. One possibility is that the chemical peculiarity may be the result of diffusion or mass loss, although stellar models show that this would normally only occur near the end of a star's hydrogen-burning lifespan. Precise measurements of this blueshift give a value of −13.9 ± 0.9 km/s. Vega Is THE brightest star in the summer sky. As of 2002, about 400 of these stars have been found, and they have come to be termed "Vega-like" or "Vega-excess" stars. [80] Vega will make its closest approach in an estimated 264,000 years at a perihelion distance of 13.2 ly (4.04 pc). A measurement of the sensitivity of an option’s value to a change in volatility. In 2016, the International Astronomical Union organized a Working Group on Star Names(WGSN) to catalog and standardize proper names for stars. These much wider disks were found to be circular and free of clumps, with dust particles ranging from 1–50 μm in size. Further research has been done and this event has been analyzed by Nilesh Oak based upon using astronomical calculations in his book on Mahabharata dating. [58], The energy flux from Vega has been precisely measured against standard light sources. 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