Ankara vs Vega

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Ankara ( ANK-ə-rə, also US: AHNK-ə-rə, Turkish: [ˈaŋkaɾa] (listen)), historically known as Ancyra ( an-SY-rə) and Angora ( ang-GOR-ə, also US: ANG-gə-rə), is the capital of Turkey. Located in the central part of Anatolia, the city has a population of 4.5 million in its urban center and over 5.6 million in Ankara Province, making it Turkey's second-largest city after Istanbul. Serving as the capital of the early Celtic country of Galatia (280--64 BC), and later of the Roman province with the identical name (25 BC--7th century), the city is very old with various Hattian, Hittite, Lydian, Phrygian, Galatian, Greek, Persian, Roman, Byzantine, and Ottoman archaeological sites. The Ottomans made the city the capital first of the Anatolia Eyalet (1393--late 15th century), and the Angora Vilayet (1867--1922). The historic center of Ankara is a rocky mountain climbing 150 m (500 ft) over the left bank of the Ankara River, a tributary of the Sakarya River. The hill remains crowned by the ruins of Ankara Castle. Although few of its outworks have survived, there are well-preserved examples of Roman and Ottoman architecture across the city, the most remarkable being the 20 BC Temple of Augustus and Rome that boasts the Monumentum Ancyranum, the inscription recording the Res Gestae Divi Augusti.

On 23 April 1920, the Grand National Assembly of Turkey was established in Ankara, which became the headquarters of the Turkish National Movement during the Turkish War of Independence. Ankara became the new Turkish capital upon the organization of the Republic on 29 October 1923, succeeding in this role the former Turkish capital Istanbul (Constantinople) following the collapse of the Ottoman Empire. The government is a prominent employer, but Ankara is also an important commercial and industrial city, located at the centre of Turkey's road and railway networks. The city gave its name to the Angora wool shorn from Angora rabbits, the long-haired Angora goat (the origin of mohair), and the Angora cat. The area is also famous for its pears, honey and muscat grapes. Although located in one of the driest regions of Turkey and surrounded largely by steppe vegetation (except for the forested areas on the southern periphery), Ankara can be considered a green city in terms of green areas per inhabitant, at 72 square metres (775 square feet) per head.

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