Complex sentence: Nearby comets can even be seen in X-ray as solar wind ions flying to the coma are neutralized, and cometary X-ray spectra therefore reflect the state of the solar wind rather than that of the comet.
Split into simpler sentences: Nearby comets can even be seen in X-ray as solar wind ions flying to the coma are neutralized. The cometary X-ray spectra therefore reflect the state of the solar wind rather than that of the comet.