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Angstrom (or) Ångström, Anders Jonas (1814-1874)
A Swedish astrophysicist who worked in spectroscopy and solar physics.

His writing titled Recherches sur le spectre solaire (1868) presented an atlas of the solar spectrum with measurements of 1,000 spectral lines expressed in units of one-ten-millionth of a millimeter, the unit which later became the angstrom or ångstrom.

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