China and Europe launched a joint space mission on Thursday to study how Earth's magnetic field protects the planet from solar radiation, a rare collaboration amid intensifying space competition.

The ambitious 2.3 tonne satellite called Smile aims to understand solar turbulence and predict geomagnetic storms that can disrupt communications, knock out power grids, and damage electronics. The mission, delayed by at least a year due to logistical hurdles like export controls and safety regulations, will observe Earth's magnetosphere during a period of high solar activity.

While ESA and China's CAS agreed on the project in 2016 when geopolitical conditions favored cooperation, the US and China are locked in a space race to return humans to the Moon. Despite this, both sides are keen to maintain collaboration channels, contributing instruments to each other's spacecraft. The mission's four instruments, including a soft X-ray imager from Leicester University, will map magnetosphere boundaries for the first time, helping predict dangerous solar storms like the May 2024 event that disrupted global satnav signals.

Smile represents a significant step in space science, offering the first continuous view of auroras over the North Pole and providing critical data to mitigate future solar storm impacts.