The observation of the VUV spectrum of comets from rockets and satellites has brought to light some new clues on those primitive bodies that could be the link between interstellar molecules and early planetary atmospheres as well as the bridge between stellar and planetary astrophysics.
© 1980 Optical Society of America
A. H. Delsemme, "Pristine nature of comets as revealed by their UV spectrum," Appl. Opt. 19, 4007-4014 (1980)