... Two Hours Before Neptune . ... On another Valentine's Day 25 years ago, cruising four billion miles from the Sun, the Voyager 1 spacecraft looked back one last time to make this first ever Solar System family portrait. ... Some 60 million light-years away in the southerly constellation Corvus, two large galaxies are colliding. ... The structure lies within one of our galaxy's largest star forming regions, the Carina Nebula, shining in southern skies at a distance of about 7,500 light-years. ...