The three members of the 16th International Space Station crew experienced a "ballistic trajectory" while returning from the station to the steppes of Kazakhstan in their Soyuz capsule on Saturday. Translation: Their spacecraft fell to earth like a lead weight, subjecting them to double the g-forces expected.

Using the highest-resolution mapping data of the moon's south pole ever obtained, NASA has created an animation that shows what it would look like to descend to the rim of the Shackleton Crater—which has been proposed as a landing site for a future human mission.