Vega vs Mannheim

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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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Mannheim (German pronunciation: [ˈmanhaɪm] (listen); Palatine German: Mannem or Monnem) is a Universitätsstadt (university town) in the southwestern part of Germany and the third-largest in the German state of Baden-Württemberg after Stuttgart and Karlsruhe with a 2019 population of approximately 310,700 inhabitants. The city is at the centre of the Rhine-Neckar Metropolitan Region and is Germany's eighth-largest metropolitan region. Mannheim is located at the confluence of the Rhine and the Neckar in the northwestern corner of Baden-Württemberg. The Rhine separates Mannheim from the city of Ludwigshafen, just to the west of it in Rhineland-Palatinate, and the border of Baden-Württemberg with Hesse is just to the north. Mannheim is downstream along the Neckar from the city of Heidelberg. Mannheim is unusual among German cities in that its streets and avenues are laid out in a grid pattern, leading to its nickname "die Quadratestadt" (the Square City). The eighteenth century Mannheim Palace, former home of the Prince-elector of the Palatinate, now houses the University of Mannheim.

The city is home to major corporations including Daimler, John Deere, Caterpillar, ABB, Fuchs Petrolub, IBM, Roche, Reckitt Benckiser, Unilever, Phoenix Group, Pepperl+Fuchs, Siemens, and several other well-known companies. In addition, Mannheim's SAP Arena is not only the home of the German ice hockey record champions the Adler Mannheim, but also the well-known handball team, the Rhein-Neckar Löwen. Since 2014, Mannheim has been a member of the UNESCO Creative Cities Network and holds the title of "UNESCO City of Music". Mannheim is a smart city; the city's electrical grid is installed with a power-line communication network.The city's tourism slogan is "Leben. Im Quadrat." (Life. In the Square.) The civic symbol of Mannheim is der Wasserturm (the Watertower), a Romanesque water tower completed in 1886 that rises to 60 metres (200 feet) above the highest point of the art nouveau area Friedrichsplatz. Mannheim is the starting and finishing point of the Bertha Benz Memorial Route.

Source: Wikipedia