Araxá vs Vega

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The Kingdom of Armenia, also the Kingdom of Greater Armenia, or simply Greater Armenia (Armenian: Մեծ Հայք Mets Hayk; Latin: Armenia Maior), sometimes referred to as the Armenian Empire, was a monarchy in the Ancient Near East which existed from 321 BC to 428 AD. Its history is divided into successive reigns by three royal dynasties: Orontid (321 BC–200 BC), Artaxiad (189 BC–12 AD) and Arsacid (52–428).The root of the kingdom lies in one of the satrapies of the Achaemenid Empire of Persia called Armenia (Satrapy of Armenia), which was formed from the territory of the Kingdom of Ararat (860 BC–590 BC) after it was conquered by the Median Empire in 590 BC. The satrapy became a kingdom in 321 BC during the reign of the Orontid dynasty after the conquest of Persia by Alexander the Great, which was then incorporated as one of the Hellenistic kingdoms of the Seleucid Empire. Under the Seleucid Empire (312–63 BC), the Armenian throne was divided in two – Armenia Maior and Sophene – both of which passed to members of the Artaxiad dynasty in 189 BC. During the Roman Republic's eastern expansion, the Kingdom of Armenia, under Tigranes the Great, reached its peak, from 83 to 69 BC, after it reincorporated Sophene and conquered the remaining territories of the falling Seleucid Empire, effectively ending its existence and raising Armenia into an empire for a brief period, until it was itself conquered by Rome in 69 BC.

The remaining Artaxiad kings ruled as clients of Rome until they were overthrown in 12 AD due to their possible allegiance to Rome's main rival in the region, Parthia. During the Roman–Parthian Wars, the Arsacid dynasty of Armenia was founded when Tiridates I, a member of the Parthian Arsacid dynasty, was proclaimed King of Armenia in 52. Throughout most of its history during this period, Armenia was heavily contested between Rome and Parthia, and the Armenian nobility was divided among pro-Roman, pro-Parthian or neutrals. From 114 to 118, Armenia briefly became a province of the Roman Empire under Emperor Trajan. The Kingdom of Armenia often served as a client state or vassal at the frontier of the two large empires and their successors, the Byzantine and Sassanid empires. In 301, Tiridates III proclaimed Christianity as the state religion of Armenia, making the Armenian kingdom the first state to embrace Christianity officially. During the Byzantine–Sasanian wars, Armenia was ultimately partitioned into Byzantine Armenia in 387 and Persian Armenia in 428.

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