How does Earth protect itself from the Sun? New mission to find out, Pg9

Key Highlights:

• The Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) mission, a joint effort by Chinese and European space agencies, is set to launch on Tuesday at 05:52 CEST (09:22 IST).
• The SMILE mission aims to capture the first X-ray images of Earth’s protective magnetic shield as it deflects harmful particles from the Sun.
• The satellite will be positioned 1.21 lakh km above Earth’s north pole to observe the edge of the magnetosphere.
• The SMILE mission weighs approximately 2,600 kg and has a mission life of about three years.

Detailed Insights:

• The magnetosphere, a vast, comet-shaped bubble, protects Earth from various types of matter, magnetic fields, energy, and plasma constantly spewed by the Sun.
• The SMILE mission will capture the full spectrum of interaction between solar ejections and the outer layers of Earth’s magnetic field, which cause auroras.
• By studying these interactions, the SMILE mission can help develop an early warning system for solar flares, protecting space assets and ground-based infrastructure like electricity grids.
• The mission carries four scientific instruments, including the Soft X-ray Imager (SXI) developed by ESA, and the Magnetometer, Light Ion Analyser (LIA), and Ultraviolet Aurora Imager (UVI) developed by the Chinese team.

Scientific/Technical Concepts Involved:

• Magnetosphere: The region of space surrounding Earth dominated by its magnetic field, protecting it from solar wind.
• Solar flares: Sudden releases of energy from the Sun's surface, potentially disrupting space weather and affecting Earth.
• Auroras: Natural light displays in the sky, predominantly seen in high-latitude regions, caused by charged particles interacting with the atmosphere.