A mysterious spiraling blue light illuminated the night skies over Europe on Monday ... shows the glowing light spinning across the sky in what many social media commentators likened to a spiral ...

A celestial phenomenon is forming in the Northern Hemisphere on Friday, as seven planets are expected to appear lined up in the night sky. Most are ... as both planets are blue and orbit in ...

Stunning livecam imagery captured in Croatia shows a mesmerizing blue spiral in the night sky that left many people astounded on March 24. The phenomenon was likely caused by frozen fuel from the ...

This month will usher in two separate conjunctions — one between the moon and a rarely-visible Mercury, and another between ...

Here’s how it works. Extremely rare, vibrant "moonbows" were spotted in the night sky above the U.S. shortly before the rise of the blue supermoon on Monday (Aug. 19). The moon will remain ...