India aims at self-reliance in solar physics, space weather, PgII.

Key Highlights:

• Indian astronomers are focusing on understanding solar eruptions like solar flares and coronal mass ejections (CMEs) to protect space assets and terrestrial infrastructure.
• Aditya-L1, India's first solar space observatory, was launched in September 2023 and is stationed at Lagrange point 1 (L1), providing high-resolution data of the solar atmosphere.
• Scientists suggest deploying instruments at Lagrange points L4 and L5 to create a comprehensive observation network for improved prediction of solar events.
• The National Large Solar Telescope, a two-meter-class ground-based telescope, is proposed to study the sun's lower atmosphere with high resolution.
• ISRO and ARIES are conducting workshops to educate early-career researchers and students in solar physics using Aditya-L1 data.

Detailed Insights:

• Solar flares and CMEs can disrupt communications, navigation, and power grids, making their prediction crucial for mitigating damage to satellites and infrastructure.
• Aditya-L1 at L1 detects eruptions moving towards Earth, while spacecraft at L4 and L5 can observe solar regions before they rotate towards Earth, enabling early detection of CMEs.
• A network of spacecraft at L1, L4, and L5 would allow researchers to accurately compute the 3D trajectories of solar phenomena and improve estimates of their arrival times on Earth.
• Challenges in predicting CMEs include incomplete understanding of their connection to the solar wind, poorly defined magnetic structures, and complex interactions with ambient solar magnetic fields.
• The Indian solar physics community aims to develop state-of-the-art prediction models for solar flares and CME arrival times, fostering self-reliance in understanding space weather.
• Opening the space sector to private companies is expected to drive innovation in modeling solar storms and predicting space weather, enhancing India's capabilities in this field.

Scientific/Technical Concepts Involved:

• Solar Flare: A massive explosion on the sun caused by the rapid release of energy from twisted magnetic fields, emitting radiation across the electromagnetic spectrum.
• Coronal Mass Ejection (CME): A sudden discharge of a large amount of plasma from the sun's corona.
• Lagrange Points: Positions in space where gravitational forces balance out, allowing spacecraft to maintain stable positions with minimal fuel use.