China on Tuesday released the results of its first solar observation satellite named "Xihe" with breakthroughs in technology verification and data shared with the international community. The satellite has, for the first time globally, obtained the fine structure of solar Hɑ, SiΙ and FeΙ spectral lines in orbit, which can directly reflect the characteristics of solar eruptions.

Solar spectral lines, or the Frauenhofer lines, are any of the dark absorption lines in the spectrum of the Sun or other star caused by selective absorption of the Sun's or star's radiation at specific wavelengths by the various elements existing as gases in its atmosphere.