The light from each star is directed through a prism to produce a spectrum. Each of the spectra has a set of absorption lines created by the presence of hydrogen in the stars' atmospheres.

Hydrogen gas is a promising ... resulting in a dark line in the absorption spectrum, known as the absorption line. By ...

Treasury’s 45V guidance offers flexibility, easing hurdles for green hydrogen adoption and stalled projects. Plug Power's U.S. growth potential skews post-2026 despite short-term reliance on ...

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 ...

The findings could shed important new light on how the outer ... "We've strongly suspected that hydrogen sulphide gas was influencing the millimetre spectrum of Uranus for some time, but we ...