space
On May 19, 2026, a spacecraft jointly built by the European Space Agency and the Chinese Academy of Sciences launched to take the first-ever X-ray images of Earth's protective response to particles streaming from the Sun.
SMILE, short for Solar wind Magnetosphere Ionosphere Link Explorer, is the correct answer because it is the joint ESA-China mission designed specifically to capture the first-ever X-ray images of Earth's magnetic shield as it deflects the solar wind. Earth's magnetosphere glows faintly in X-rays when charged particles from the Sun collide with it, and SMILE's X-ray camera can image that interaction as a whole, something no single ground observatory can do, while an onboard ultraviolet camera simultaneously watches the aurora for extended stretches.
Solar Orbiter is a separate ESA mission that studies the Sun itself up close, including its poles, rather than imaging Earth's magnetic response. Parker Solar Probe is a NASA mission that flies directly through the Sun's outer atmosphere to sample solar wind at its source — neither carries the Earth-facing X-ray imaging instruments that define SMILE.
SMILE stands out as the first mission ever jointly designed, built, launched, and operated by ESA and a Chinese space agency together, a rare instance of a Western and Chinese space program collaborating on hardware from the ground up.
space
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