hydrogen gas

(Newser) - Much like on Earth's surface, water and rock reside deep within its crust, and they date to the earliest parts of the planet's history—leaving researchers fascinated by the secrets they may hold. In a new study published in Nature , they explain that not only is there more...

(Newser) - A cloud of hydrogen 11,000 light years long and 2500 light years wide is headed straight for our galaxy, and the inevitable collision will create a spectacular burst of star formation. But don't plan your viewing party yet—Smith's Cloud, as it is called, won't arrive for another 20...