Cygnus X hosts many young stellar groupings ... In this 8-micron infrared image, ridges of denser gas mark the boundaries of the cavities. Bright spots within these ridges show where stars ...

An explanation of the images PIA17172 and PIA17171, the day the Earth smiled in 4K UHD. Trump to sign order making English the official U.S. language Lester Holt to step down as anchor of 'NBC ...