Eos, a newly discovered hydrogen cloud just 300 light-years from Earth, offers a rare look at hidden star-forming regions.

At these heights, the atmosphere is cold enough that clouds are typically composed of ice crystals, not water droplets. These clouds often look thin, wispy, and delicate—but they can provide valuable ...

One of the largest structures in the sky, as seen from our perspective, has only just been discovered. It’s an enormous cloud ...

The find shines light on how galaxies begin to turn gas and dust "into stars and planets," said astrophysicist Blakesley ...