We still don't fully understand what triggers lightning. A new study suggests that showers of cosmic rays may be the missing ...

Astronomers have discovered a new giant molecular cloud (GMC) in the Milky Way, a finding that has expanded our understanding ...

A schematic showing how the X-ray flares from our supermassive black hole, Sgr A*, propagate outwards, interact with and re-emit light from molecular clouds and then travels to Earth. The X-rays ...