Even the faintest trace of hydrogen gas can spell trouble. In a chemical plant, it may auger a catastrophic industrial explosion; on a patient’s breath, it can signal various gastrointestinal ...

Ultraviolet (UV) light shining from these small galaxies may have powered an epoch known as the Era of Reionization, clearing the fog of hydrogen gas that permeated the universe in its first billion ...

A quiet, glowing gas cloud has been hiding in plain sight not far from Earth. For decades, astronomers have predicted that ...

NASA's Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft obtained this ultraviolet image of hydrogen surrounding comet C/2013 A1 Siding Spring on Oct. 17, 2014, two days before the comet's ...

Ultraviolet light slips through a hole in a distant galaxy’s gas. Older galaxies might have used the trick to ionize most of the universe’s hydrogen.

Previously, the Penn State scientists had reported the development of titania nanotube arrays with a photoconversion efficiency of 16.5% under ultraviolet light.

Astronomers have discovered a massive hydrogen cloud, known as Eos, shining brightly in ultraviolet light near our solar system. This newly detected cloud offers fresh insights into how stars and ...

The Orion Nebula has plenty of hydrogen gas, so when ultraviolet light heats up the surrounding hydrogen molecules, it creates a perfect condition for hydrocarbons to form.

Piling on to the good news from Mars this week, NASA’s MAVEN spacecraft sent home its first ultraviolet images from Mars. While they may not be flashy, ...

RADIANT GLOW Ultraviolet light (orange) pours out of a galaxy in this image from NASA’s GALEX satellite.New Hubble observations reveal this galaxy might mimic the earliest galaxies in the universe.

Ultraviolet light blasting the atmosphere of giant exoplanet WASP-39b is producing a toxic gas called sulfur dioxide. Photochemistry is a key process in Earth’s atmosphere too, and on most of ...