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HD 140283 (also known as the Methuselah star) is a metal-poor subgiant star about 200 light years away from the Earth in the constellation Libra, near the boundary with Ophiuchus in the Milky Way Galaxy.
PSR B1620-26 b is an exoplanet located approximately 12,400 light-years from Earth in the constellation of Scorpius.It bears the unofficial nicknames "Methuselah" and "the Genesis planet" (named after the Biblical character Methuselah, who, according to the Bible, lived to be the oldest person) due to its extreme age.
PSR B1620−26 is a binary star system located at a distance of 3,800 parsecs (12,400 light-years) in the globular cluster of Messier 4 (M4, NGC 6121) in the constellation of Scorpius. [ 2 ] [ 3 ] [ 4 ] The system is composed of a pulsar ( PSR B1620−26 A ) and a white dwarf star (WD B1620−26, or PSR B1620−26 B ).
The subgiant star HD 140283, believed to be the oldest extant star discovered, is often nicknamed "The Methuselah Star" after the ancient biblical figure. [45] The name is also used to refer to the exoplanet PSR B1620−26 b, which is one of the oldest known exoplanets with an estimated age of 12.7 billion years old. [46]
The following is a list of stars with resolved images, that is, stars whose images have been resolved beyond a point source. Aside from the Sun , observed from Earth , stars are exceedingly small in apparent size, requiring the use of special high-resolution equipment and techniques to image.
Methuselah (cellular automaton), a long-surviving pattern in Conway's Game of Life; Methuselah-like proteins, insect proteins that extend the life span of the animal; Methuselah (planet), nickname for PSR B1620-26 b, one of the oldest exoplanets; Methuselah star, nickname for HD 140283, one of the oldest stars known
The age of the oldest known stars approaches the age of the universe, about 13.8 billion years. Some of these are among the first stars from reionization (the stellar dawn), ending the Dark Ages about 370,000 years after the Big Bang. [1] This list includes stars older than 12 billion years, or about 87% of the age of the universe.
The oldest star yet discovered, HD 140283, nicknamed Methuselah star, is an estimated 14.46 ± 0.8 billion years old. [127] (Due to the uncertainty in the value, this age for the star does not conflict with the age of the universe, determined by the Planck satellite as 13.799 ± 0.021). [127] [128]