A video of a strange shadow line in the sky spotted from a plane has gone viral ... are narrow cirrus cloud streamers that form behind high flying aircraft." The NASA website explains: "When ...

A “rare planetary parade”, with seven planets aligning in a single line, was viewed in an ethereal ... The seven planets were visible in the evening sky soon after sunset, and the best time ...

A rare seven-planet alignment will be visible in the early night sky ... see if cloud cover might impact your view on the night you plan to look up. Face southward during the early evening hours. The ...