"Light Echoes" Prove That This Neutron Star is Weirdly Like a Black Hole

Between rainbows, rings, and sharp, hard lines, it’s difficult to not clap my hands in glee while unpacking the levels of awesome crammed in this X-ray image of Circinus X-1. The beautiful bullseye light echoes hint this neutron star is farther, brighter, and more like a black hole than we thought. » 6/25/15 10:00pm 6/25/15 10:00pm

A Rare Glimpse Of Rapidly Pulsating Aurorae Over Iceland

Aurorae are rare. Pulsating aurorae, whose structures fade in and out of existence, are rarer, still. But rapidly pulsating aurorae, like that featured in this video by French astrophotographer Stéphane Vetter (previously), are among the least common of all. This footage is not a time-lapse; the colors in this video… » 6/11/15 6:00pm 6/11/15 6:00pm