Follow the space program since the moon landing in the four-part documentary "Once Upon a Time in Space". Here’s how to watch it anywhere on the planet.

Israeli astronaut Ilan Ramon had a question before going into space: How would he mark Sabbath, the Jewish day of rest, from orbit? Sabbath begins Friday at sunset and ends Saturday after sunset. But astronauts circling the Earth see a sunrise and sunset ...

Humanity’s return to the Moon is accelerating—and with it, the question of where astronauts will live once they arrive. One visionary architect believes he has the answer: giant, blown-glass spheres that rise from the lunar surface like something from science fiction.