HOUSTON – Before astronauts aboard Artemis II ever left Earth, they spent years inside a simulator in Houston preparing for nearly every scenario they could face in space. At NASA’s Johnson Space ...

Four volunteers, sealed inside a Mars simulation in Houston for a year. 22-minute delays. Total isolation. They won’t step out until Oct. 2026.

Twenty-eight Chinese astronauts have just completed a highly demanding cave-training mission designed to replicate the psychological and physical extremes of spaceflight. As reported by CGTN, the ...