Half of the universe’s hydrogen gas, long unaccounted for, has been found: « New measurements of the diffuse ionized hydrogen surrounding galaxies account for missing mass. »
Half of the universe's hydrogen gas, long unaccounted for, has been found
Astrophotographer captures colorful portrait of the Lion Nebula in a glowing field of hydrogen gas
Astronomers Accidentally Find A Galaxy That Hasn’t Birthed Any Stars. A typo sent an enormous radio telescope to the wrong patch of sky — where it discovered an invisible galaxy-sized cloud of hydrogen gas.
