To mark our anniversary, PBS News spoke with people who have been longtime viewers to hear how the show, and later its work online and across social media, has helped shape their lives.

Blue Origin, owned by Jeff Bezos, and Lockheed Martin are among the contractors that may compete with Elon Musk’s company in the race back to the lunar surface.

NASA's top official on Monday said the U.S. space agency was opening up the contract for its Artemis 3 moon mission to compete against SpaceX, which he said was running behind schedule.