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Westminster
Vega

Westminster vs Vega

Westminster
Vega
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Westminster

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Westminster is a district in central London, part of the wider City of Westminster. The area, which extends from the River Thames to Oxford Street has many visitor attractions and historic landmarks, including the Palace of Westminster, Buckingham Palace, Westminster Abbey, Westminster Cathedral and much of the West End shopping and entertainment district. The name Westminster (Old English: Westmynstre) originated from the informal description of the abbey church and royal peculiar of St Peter's (Westminster Abbey), located west of the City of London (until the Reformation there was also an Eastminster, near the Tower of London, in the East End of London). The abbey's origins date from between the 7th and 10th centuries, but it rose to national prominence when rebuilt by Edward the Confessor in the 11th.



It has been the home of the permanent institutions of England's government continuously since about 1200, and from 1707 the British Government. In a government context, Westminster often refers to the Parliament of the United Kingdom, located in the UNESCO World Heritage Palace of Westminster — also known as the Houses of Parliament. The area is the centre of Her Majesty's Government, with Parliament in the Palace of Westminster and most of the major Government ministries known as Whitehall, itself the site of the royal palace that replaced that at Westminster.

Source: Wikipedia
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Vega

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Vega is the brightest star in the northern constellation of Lyra. It has the Bayer designation α Lyrae, which is Latinised to Alpha Lyrae and abbreviated Alpha Lyr or α Lyr. This star is relatively close at only 25 light-years from the Sun, and, together with Arcturus and Sirius, one of the most luminous stars in the Sun's neighborhood. It is the fifth-brightest star in the night sky, and the second-brightest star in the northern celestial hemisphere, after Arcturus. Vega has been extensively studied by astronomers, leading it to be termed "arguably the next most important star in the sky after the Sun". Vega was the northern pole star around 12,000 BC and will be so again around the year 13,727, when its declination will be +86° 14′. Vega was the first star other than the Sun to be photographed and the first to have its spectrum recorded. It was one of the first stars whose distance was estimated through parallax measurements. Vega has functioned as the baseline for calibrating the photometric brightness scale and was one of the stars used to define the zero point for the UBV photometric system.



Vega is only about a tenth of the age of the Sun, but since it is 2.1 times as massive, its expected lifetime is also one tenth of that of the Sun; both stars are at present approaching the midpoint of their life expectancies. Vega has an unusually low abundance of the elements with a higher atomic number than that of helium. Vega is also a variable star that varies slightly in brightness. It is rotating rapidly with a velocity of 236 km/s at the equator. This causes the equator to bulge outward due to centrifugal effects, and, as a result, there is a variation of temperature across the star's photosphere that reaches a maximum at the poles. From Earth, Vega is observed from the direction of one of these poles.Based on an observed excess emission of infrared radiation, Vega appears to have a circumstellar disk of dust. This dust is likely to be the result of collisions between objects in an orbiting debris disk, which is analogous to the Kuiper belt in the Solar System. Stars that display an infrared excess due to dust emission are termed Vega-like stars.

Source: Wikipedia

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