Cape Town vs Vega

Informations

Cape Town (Afrikaans: Kaapstad [ˈkɑːpstat]; Xhosa: iKapa;) is the second most populous city in South Africa, after Johannesburg, and also the legislative capital of South Africa. Colloquially named the Mother City, it is the largest city of the Western Cape province and forms part of the City of Cape Town metropolitan municipality. The Parliament of South Africa is situated in Cape Town. The other two capitals are located in Gauteng (Pretoria the executive capital where the Presidency is based) and in the Free State (Bloemfontein the judicial capital where the Supreme Court of Appeal is located). The city is known for its harbour, for its natural setting in the Cape Floristic Region, and for landmarks such as Table Mountain and Cape Point. Cape Town is home to 64% of the Western Cape's population. The city was named the World Design Capital for 2014 by the International Council of Societies of Industrial Design.

In 2014, Cape Town was named the best place in the world to visit by both The New York Times and The Daily Telegraph. Cape Town has also been a host city for both the 1995 Rugby World Cup and 2010 FIFA World Cup, annually hosts the Africa leg of the World Rugby 7s.Located on the shore of Table Bay, Cape Town, as the oldest urban area in South Africa, was developed by the United East India Company (VOC) as a supply station for Dutch ships sailing to East Africa, India, and the Far East. Jan van Riebeeck's arrival on 6 April 1652 established the VOC Cape Colony, the first permanent European settlement in South Africa. Cape Town outgrew its original purpose as the first European outpost at the Castle of Good Hope, becoming the economic and cultural hub of the Cape Colony. Until the Witwatersrand Gold Rush and the development of Johannesburg, Cape Town was the largest city in South Africa.

Source: Wikipedia

Informations

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