... Circles in the Sky . ... Sideways Galaxy NGC 3628 . ... Dark dust lanes cut across the middle of this gorgeous island universe, a strong hint that NGC 3628 is a spiral galaxy seen sideways. ... Visible vistas include a vast and colorful Earth, a deep dark sky, and an occasional spaceship sent to visit the station. ... Retrograde Mars . ... Most of the time, the apparent motion of Mars in Earth's sky is in one direction, slow but steady in front of the far distant stars. ... Stars and Mars . ...