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The Most Metal Poor Stars are Living Fossils from the Beginning of the Universe
Our Sun, like all stars, is made mostly of hydrogen and helium. They are by far the most abundant elements, formed in the early moments of the Universe. But our star is also rich in other elements astronomers call "metals." Carbon, nitrogen, iron, gold, and more. These elements were created through astrophysical processes, such as supernovae and neutron star collisions. The dust of long-dead stars that gathered together into molecular clouds and formed new, younger stars such as the Sun. Stars rich in metals. But there are still stars out there that are not metal rich. These extremely metal-poor stars, or EMPs, hold clues to the origin of stars in the cosmos.
Our Sun, like all stars, is made mostly of hydrogen and helium. They are by far the most abundant elements, formed in the early moments of the Universe. But our star is also rich in other elements astronomers call "metals." Carbon, nitrogen, iron, gold, and more. These elements were created through astrophysical processes, such as supernovae and neutron star collisions. The dust of long-dead stars that gathered together into molecular clouds and formed new, younger stars such as the Sun. Stars rich in metals. But there are still stars out there that are not metal rich. These extremely metal-poor stars, or EMPs, hold clues to the origin of stars in the cosmos.
