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 ...

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.

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