Riyadh vs Vega

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Riyadh (Arabic: الرياض‎, romanized: ar-Riyāḍ, lit. 'The Gardens' [ar.riˈjaːdˤ] Najdi pronunciation: [er.rɪˈjɑːðˤ]) is the capital of Saudi Arabia and the largest city on the Arabian Peninsula. Located in the center of the an-Nafud desert, on the eastern part of the Najd plateau, the city sits at an average of 600 metres (2,000 ft) above sea level, and receives more than 16 million tourists each year, making it the 2nd most visited city in the Arab world. Riyadh had a population of 7.6 million people in 2019, making it the most populous city in Saudi Arabia, 2nd most populous in the Arab world (after Cairo), and 38th most populous in Asia.The first mentioning of the city by the name Riyadh was in 1590, by an early Arab chronicler. In 1737, Deham Ibn Dawwas, who was from the neighboring Manfuha, settled in and took control of the city. Deham built a wall around the city, and the best known source of the name Riyadh is from this period, thought to be referring to the earlier oasis towns that predated the wall built by Ibn Dawwas. In 1744, Muhammad ibn 'Abd al-Wahhab formed an alliance with the Emir of Dir'iyah, Muhammad bin Saud, and in 1774, they took Riyadh from Deham. However their state, now known as the First Saudi State, came to a collapse in 1818. Turki ibn Abdullah founded the Second Saudi State in the early 19th century and made Riyadh his capital in 1825. However, his reign over the city was disrupted by a joint Ottoman–Rashidi alliance. Finally, in the early 20th century, 'Abdulaziz ibn Saud, known in the west simply as Ibn Saud, retrieved his ancestral kingdom of Najd in 1902 and consolidated his rule by 1926 with the final Saudi conquest of Hejaz. After this he named his kingdom Saudi Arabia in September 1932 with Riyadh as the capital.Riyadh is the political and administrative centre of Saudi Arabia.

The Consultative Assembly (also known as the Shura or Shura Council), the Council of Ministers of Saudi Arabia, the King and the Supreme Judicial Council of Saudi Arabia are all situated in the city. Alongside these four bodies that form the core of the legal system of Saudi Arabia, the headquarters of other major and minor governmental bodies are also located in Riyadh. The city hosts 112 foreign embassies, most of which are located in the as-Safarat district or Diplomatic Quarter (Arabic: حي السفارات‎, romanized: Hayy as-Safarat, lit. 'District of Embassies') in the western reaches of the city. RIyadh also holds great economic significance, as it hosts the headquarters of many banks and major companies, such as the National Commercial Bank (NCB), Alinma Bank and the Saudi Arabian British Bank (SABB). Highway 65, known locally as the King Fahd Road, runs through some of these important centers in the city, including the King Abdullah Financial District, one of the world's largest financial districts, the Faisaliyah Center and the Kingdom Center. Riyadh is one of the world's fastest-growing cities in population and is home to many expatriates. Riyadh has been designated a global city.The city is divided into 15 municipal districts, which are overseen by the Municipality of Riyadh (Arabic: أمانة الرياض‎, romanized: Amanat ar-Riyad, lit. 'Protectorate of Riyadh') headed by the mayor; and the Royal Commission for Riyadh which is chaired by the Governor of the Province, Faisal bin Bandar Al Saud. As of July 2020, The mayor is Faisal bin Abdulaziz bin Mohammed bin Ayyaf Al-Muqrin. Most of the population of the Riyadh Province is concentrated around Riyadh, as the rest of the province is mostly desert, with few, small cities connected by small two- to four-lane highways, such as Wadi ad-Dawasir.

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