These series were observed a few years ago by Prof. Fowler by sending a heavy discharge through a mixture of hydrogen and helium; previously they had been observed only in star spectra.

retaining some hydrogen in their envelope, named after their prototype. One of the stars reported in the study, named Gaia DR3 52, turned out to be a hot subdwarf of spectral type O(He).

MANY examples of changes in ultra-violet absorption spectra attributable to hydrogen bonding have been reported and summarized by Ito 1. However, in few of these cases has the change in ...

An SwRI-led team detected carbon dioxide and hydrogen peroxide spectral signatures on Pluto’s largest moon Charon using Webb telescope observations (white), which extend the wavelength coverage ...