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[1] [13] However, more recent models of its stellar evolution have suggested revision of the star's age to 13.7 billion years [14] or 12 billion years. [ 5 ] Dubbed the " Methuselah Star" by the popular press due to its age, [ 15 ] [ 16 ] the star must have formed soon after the Big Bang [ 1 ] and is one of the oldest stars known as of 2021. [ 5 ]
The Stella d'Italia ("Star of Italy"), popularly known as Stellone d'Italia ("Great Star of Italy"), [14] is a five-pointed white star, which has symbolized Italy for many centuries. It is the oldest national symbol of Italy , since it dates back to Graeco-Roman mythology [ 13 ] when Venus , associated with the West as an evening star, was ...
The formation of individual stars can only be directly observed in the Milky Way Galaxy, but in distant galaxies star formation has been detected through its unique spectral signature. Initial research indicates star-forming clumps start as giant, dense areas in turbulent gas-rich matter in young galaxies, live about 500 million years, and may ...
Pentagram symbols from about 5,000 years ago were found in the Liangzhu culture of China. [ 9 ] [ 10 ] A pentagram appeared in a Chinese text on music theory from the Warring States period ( c. 475 – 221 BC) as a diagram of the mathematical relations between the five notes in a particular Chinese musical scale .
A star forms by accumulation of material that falls in to a protostar from a circumstellar disk or envelope. Material in the disk is cooler than the surface of the protostar, so it radiates at longer wavelengths of light producing excess infrared emission. As material in the disk is depleted, the infrared excess decreases.
Iota Cassiopeiae is a triple star 142 light-years from Earth. The primary is a white-hued star of magnitude 4.5 and an α 2 Canum Venaticorum variable, the secondary is a yellow-hued star of magnitude 6.9, and the tertiary is a star of magnitude 8.4. The primary and secondary are close together but the primary and tertiary are widely separated.
Sigma Sagittarii (σ Sgr) ("Nunki") is the constellation's second-brightest star at magnitude 2.08. Nunki is a B2V star approximately 260 light-years away. [6] "Nunki" is a Babylonian name of uncertain origin, but thought to represent the sacred Babylonian city of Eridu on the Euphrates, which would make Nunki the oldest star name currently in ...
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