when was it discovered?
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where does the gas and dust to form stars originate from "molecular clouds" what is this quoted term means? A molecular cloud, sometimes called a stellar nursery, is a type of interstellar cloud, the density and size of which permit the formation of molecules, most commonly molecular hydrogen where this type of clouds are formed? In the space between the star systems in a galaxy what are its types? Giant molecular clouds and Small molecular clouds what are the characteristics of the above object which is formed from dust and gas? Luminosity, size, evolution, lifespan what can you tell about its age? Most stars are between 1 billion and 10 billion years old. Some stars may even be close to 13.8 billion years old—the observed age of the universe. The oldest star yet discovered, HD 140283, nicknamed Methuselah star, is an estimated 14.46 ± 0.8 billion years old. what are the chemical composition of this type of object? 71% hydrogen and 27% helium how far is the oldest object you just mentioned above is from earth? 200 light years
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HD 140283 [SEP] Introduction
HD 140283 (or 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. Its apparent magnitude is 7.205. The star's light is somewhat blueshifted as it is moving toward rather than away from us and it has been known to astronomers for over a century as a high-velocity star based on its other vectors (proper motion). An early spectroscopic analysis by Joseph W. Chamberlain and Lawrence Aller revealed it to have a substantially lower metal content than the Sun. Modern spectroscopic analyses find an iron content about a factor of 250 lower than that of the Sun.