Lying on the beach in Antigua, I stared up into the night sky, dazzled by the stars. A normal person would just sit back and ...

We are getting a look at the recent weather conditions on Mars! NASA's Curiosity rover sent back these images of twilight clouds on the Martian surface.

During the day, folks can call this a 'sun halo', but at night and when associated with the moon, try a 'lunar halo'. These ...