125 Years of Solar Physics: International Solar Conference Celebrates India’s Contributions

KKN Gurugram Desk | The International Solar Conference 2025 marks a historic milestone in the field of solar astronomy, celebrating the 125th anniversary of the Kodaikanal Solar Observatory (KSO). Established in 1899, KSO is a pioneer in Indian solar research and a cornerstone in the country’s journey of exploring the Sun and its impact on Earth. The Indian Institute of Astrophysics (IIA), an autonomous body under the Department of Science and Technology (DST), organized this significant conference on the theme “Sun, Space Weather, and Solar-Stellar Connections.”

KSO: The Birthplace of Indian Solar Research

KSO has been instrumental in shaping India’s solar physics landscape. Over the last 125 years, the observatory has provided invaluable insights into the Sun’s behavior, offering detailed photographic records of solar activities like sunspots, solar flares, and coronal mass ejections.

Speaking at the event, Prof. Annapurni Subramaniam, Director of IIA, highlighted the observatory’s historical and scientific contributions:

“This conference celebrates the birth and growth of solar astronomy in India. Experts from across the globe will come together to discuss various aspects of the Sun and space weather.”

KSO’s work has laid the foundation for solar astrophysics in India, influencing research initiatives and advancements in the field for over a century.

Key Highlights of the International Solar Conference

The conference, held in Bengaluru, Karnataka, from January 20-25, has attracted renowned experts and scientists from around the globe. The discussions focus on various aspects of solar research, including the Sun’s influence on space weather and its connections to stellar phenomena.

Major Topics of Discussion:

1. Space Weather: The impact of solar activity on Earth’s magnetosphere and technological systems.
2. Solar Observations: KSO’s contribution to the study of sunspots, solar flares, and other phenomena.
3. Technological Advancements: Exploring new instruments and space-based research opportunities for solar physics.

Digitization of KSO’s Historic Records

One of the key initiatives celebrated during the conference is the digitization of KSO’s extensive repository of photographic records. These historical solar images, dating back over a century, are a treasure trove for scientists studying long-term changes in solar activity. Prof. Abhay Karandikar, Secretary of DST, emphasized the importance of these efforts:

“Digitizing KSO’s historic records is a remarkable step in preserving and making accessible the invaluable data collected over decades. It also highlights IIA’s significant contributions to missions like Aditya-L1.”

The digitization initiative ensures that KSO’s legacy continues to benefit researchers for generations to come.

India’s Contributions to Solar Research

Aditya-L1 Mission

The conference also showcased India’s achievements in space-based solar research, particularly the Aditya-L1 mission, India’s first solar mission launched by ISRO. The mission aims to study the Sun’s corona, solar winds, and their effects on Earth’s magnetosphere. Prof. Karandikar lauded the IIA’s role in this landmark project, further cementing India’s position in global solar research.

National Large Solar Telescope

Another ambitious project highlighted was the proposed National Large Solar Telescope (NLST). This cutting-edge facility, to be built near Pangong Tso in Ladakh, is expected to open new frontiers in solar astrophysics. The NLST will provide high-resolution observations of the Sun, enabling researchers to study intricate solar phenomena with unprecedented clarity.

ISRO’s Support and Future Challenges

At the conference, A.S. Kiran Kumar, former ISRO Chairman and Chair of the IIA’s Governing Council, emphasized ISRO’s capabilities in supporting solar physics research. He encouraged the scientific community to develop innovative ideas for new instruments and missions, stating:

“ISRO has the technological expertise to advance solar research from space. It’s time for researchers to challenge themselves and create instruments that can revolutionize the field.”

ISRO’s support, combined with India’s growing focus on space-based research, promises a bright future for solar astrophysics.

KSO’s Unique Contributions to Solar Physics

Located in the picturesque hill station of Kodaikanal, Tamil Nadu, the KSO is uniquely positioned for solar observations due to its geographic location and state-of-the-art equipment. Over the years, it has significantly contributed to understanding solar phenomena, including:

• Sunspots: Monitoring and documenting their patterns and impacts.
• Solar Flares: Studying their intensity and effects on Earth.
• Coronal Mass Ejections: Understanding their role in space weather and their potential to disrupt satellites and communication systems.

The observatory’s long-term data has been instrumental in understanding the Sun’s cyclical behavior and its effects on Earth.

Global Collaboration in Solar Research

The International Solar Conference also emphasized the importance of global collaboration in solar physics. With experts from around the world sharing insights and ideas, the event provides a platform for interdisciplinary research and innovation. The discussions aim to address pressing challenges in the field, such as predicting space weather events and mitigating their impact on modern technology.

The 125th anniversary of Kodaikanal Solar Observatory is not just a celebration of its historical achievements but also a stepping stone toward a brighter future in solar research. From its role in pioneering Indian solar physics to its contributions to global projects like Aditya-L1 and the upcoming NLST, KSO continues to inspire and lead in the field.

With the support of institutions like IIA, ISRO, and the global scientific community, India is poised to make groundbreaking discoveries in solar astrophysics. As Prof. Annapurni Subramaniam aptly stated, this conference is a testament to the progress and potential of solar research in India and beyond.

For more updates on scientific breakthroughs, space missions, and global conferences, stay tuned to KKNLive.com, your trusted source for in-depth news and analysis.