... Dark Sky, Bright Sun . ... In low Earth orbit there is not enough atmosphere to diffuse and scatter sunlight, so shadows are black and the sky is dark - even when the Sun shines. The harsh lighting produced this dramatic.. ... Five hundred light years from Earth, in the constellation Aquarius, a sun-like star is dying. ... In visible light, the interstellar gas cloud is crossed by dark, obscuring dust lanes which roughly divide the glowing emission nebula into three major parts. ...