Astronauts Suni Williams and Butch Wilmore—who have been in space since June after their eight-day mission went awry—did not catch a ride back to Earth on SpaceX's latest return capsule. Here's why.
For the NASAastronauts on board the International Space Station (ISS), they have to make plans to cast their ballots from 250 miles above the Earth’s surface, where they are orbiting in space.