... Moon Crashers . ... Seventeen minutes before impact it snapped this picture - the first image of the Moon ever taken by a U.S. spacecraft. ... Ozone Hole Reduced . ... Eta Carinae in X Rays . ... Eta Carinae is the one of the most luminous star systems in our Galaxy, radiating millions of times more power than our Sun. Eta Carinae is also one of the strangest star systems known, brightening and fading greatly since the early 1800s. Triton: Neptune's Largest Moon . ... Polaris: The North Star . ...