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

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 ...

Astronomers have detected a previously unknown giant molecular cloud (GMC) at the midpoint of the Galactic Bar Dust Lanes ...

According to the National Weather Service, the optical phenomenon appears as a vertical shaft of light, visible most often at sunrise or sundown. SEE ALSO: Sunshine and clouds to kick off a long ...