En route
ESCAPADE Gold (SIMPLEx-4B)
ESCAPADE Gold (SIMPLEx-4B) is one of the two twin spacecraft of NASA's ESCAPADE mission designed to jointly investigate Mars' three-dimensional magnetosphere and the loss of its atmosphere to the solar wind. Launched on November 13, 2025, via a New Glenn rocket, it is currently in interplanetary transit with an expected arrival at Mars in September 2027.