THE colour of the light which is emitted from the capillary of a vacuum tube containing pure hydrogen is the familiar vivid, deep pink, the prevailing tint being due to the predominating ...

Astronomers discovered bright hydrogen emissions from an ancient galaxy, puzzling researchers over how this light pierced the ...

"We were thrilled when we first observed the strikingly clear methane spectrum in a tiny droplet of liquid hydrogen," said Dr. Hatsuki Otani, who conducted the work while a Ph.D. student in ...

When a gas is very hot, it doesn’t emit all wavelengths of light. Hot gases don’t produce a continuous emission spectrum. Black hydrogen absorption lines are at the same wavelength as the ...