Hydrogen in the sun

In later years, astronomers began to use spectral lines to compare the position of the dark lines to determine the solar spectrum. Ångström discovered hydrogen in the Sun, and later published a spectrum with wavelengths represented by each line in units of ten-billionths of a meter, now known as the ångström.
 Anders Jonas Ångström Sweden 1862 Hydrogen in the sun

In later years, astronomers began to use spectral lines to compare the position of the dark lines to determine the solar spectrum. Ångström discovered hydrogen in the Sun, and later published a spectrum with wavelengths represented by each line in units of ten-billionths of a meter, now known as the ångström.