Perm vs Vega

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Perm (Russian: Пермь, IPA: [pʲɛrmʲ]), previously known as Yagoshikha (Ягошиха) (1723–1781), and Molotov (Мо́лотов) (1940–1957), is the largest city and the administrative centre of Perm Krai, Russia. The city is located on the banks of the Kama River, near the Ural Mountains, covering an area of 799.68 square kilometres (308.76 square miles), with a population of over 1 million residents. Perm is the fourteenth-largest city in Russia, and the fifth-largest city in the Volga Federal District. In 1723, a copper-smelting works was founded at the village of Yagoshikha. In 1781 the settlement of Yagoshikha became the town of Perm. Perm's position on the navigable Kama River, leading to the Volga, and on the Siberian Route, across the Ural Mountains helped it become an important trade and manufacturing centre. It also lay along the Trans-Siberian Railway.

Perm grew considerably as industrialization proceeded in the Urals during the Soviet period, and was named Molotov in honour of Vyacheslav Molotov. After the dissolution of the Soviet Union, the city returned to its historical name, and became the administrative centre of Perm Krai. Modern Perm is still a major railway hub and one of the chief industrial centres of the Urals region. The city's diversified metallurgical and engineering industries produce equipment and machine tools for the petroleum and coal industries, as well as agricultural machinery. A major petroleum refinery uses oil transported by pipeline from the West Siberian oilfields, and the city’s large chemical industry makes fertilizers and dyes. The city’s institutions of higher education include the Perm A.M. Gorky State University, founded in 1916.

Source: Wikipedia

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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