A man named Armin Mehdizadeh has been counting down every day since 2022. What happens when he reaches zero on Jan. 1?

NASA’s launch and mission teams, along with the Artemis II crew, completed a key test Dec. 20, a countdown demonstration test, ahead of the Artemis II flight around the Moon early next year.

NASA has taken another significant step toward returning humans to the Moon. On December 20, 2025, the Artemis II crew and launch teams completed a major countdown demonstration at the Kennedy Space ...

A major step toward launch day is complete as NASA's Artemis II astronauts ran through a countdown demonstration test.