Morgan McFall-JohnsenJenny McGrath

Space photos from 5 recent moon-landing missions show how tiny engineering errors can cause big problems, like crashing or landing sideways

Moon landings are so complex that even the tiniest mistakes have caused missions to crash or burn. These photos from space explain why.

Leap years are necessary because, without them, December would drift into summer over time. The purpose of leap year is to keep the seasons stable.

Voyager 1 captured Jupiter as nobody had ever seen it before. Now, 45 years later, NASA's Juno spacecraft is capturing even more stunning photos.

NASA opened applications for people to live a paid year in its CHAPEA Mars simulation. The job requires an agreeable personality and STEM degree.

Twelve years later, NASA's Juno spacecraft has zipped past Jupiter's poles, watched its Great Red Spot churn, and visited its largest moon, Ganymede.

Apply to live in NASA's Mars simulation for one year, where a four-person crew grows crops, practices "Marswalks," and exercises diligently.

The Trinity Test made Oppenheimer think, "Now I am become Death, the destroyer of worlds." Three weeks later, the US dropped atom bombs on Japan.