Add Yahoo as a preferred source to see more of our stories on Google. For decades, the world-famous NASA countdown clock has told the world when to hold its breath. The Artemis II launch attempt is ...

Four astronauts in training to fly around the moon early next year strapped into their Orion spacecraft this weekend for a dress rehearsal countdown in a major milestone toward launch. Based on ...

For the first time in half a century, countdown clocks began ticking Monday toward launch of a three-man one-woman crew on a trip to the moon and back, a major step in NASA's accelerated drive to ...

It's not Christmas until Mariah Carey says so. As soon as the clock struck midnight on Nov. 1, the pop star ushered in the holiday season with an over-the-top video, as she does every year. Such ...