Swedish Physicist, Discovered Hydrogen in the Sun
He was the son of a country minister and was very reserved, he was educated in Uppsala, Sweden and lectured in physics at the university for his entire career. Most of his works were published in Swedish so they did not get great attention.
Ångström was the first person to see the spectrum of hydrogen and to detect hydrogen in the Solar atmosphere. In 1867 he was the first to examine the spectrum of aurora borealis (northern lights). His main contribution was on the solar spectrum making detailed measurements of more than 1000 spectral lines, these were the same lines seen by Fraunhofer in 1814. The Angstrom unit (1A=0.1nm), used in spectroscopy and atomic physics, is named in his honour.