Using NASA's Chandra X-ray space telescope, astronomers have discovered that a galaxy cluster is wrapped in an envelope of energized particles that's 20 million light-years wide. The discovery raises ...

A mysterious purple cloud that hovered eerily over a town has baffled experts and locals. Pictures of the wispy formation were taken as it hung low over Pozo Almonte in northern Chile on Sunday ...

From galaxy mergers to mesmerising star dust- 5 NASA images far from Earth. ... cosmic cloud is studded by a collection of bluish-purple stars.

A mysterious purple cloud descended over a Chilean town Sunday. Twitter/ @JeannetteQuim Residents of Pozo Almonte, Chile, awoke to an ominous purple cloud hanging low over their city Sunday morning.