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Commemoration of Evershed Effect on its 115th years at IIA
The Indian Institute of Astrophysics is commemorating the 115th anniversary of the pioneering discovery of the Evershed Effect in 1909 at the Kodaikanal Observatory. This milestone in solar physics, rooted in India, highlights the institute’s rich history spanning over 200 years, during which it has served as a hub for theoretical and observational studies of…
Open Day 2026- Exploring the Astronomical Heritage: IIA Library & Archives Exhibition
On 21 February 2026, the Indian Institute of Astrophysics (IIA) celebrated National Science Day through its annual Open Day at the Koramangala campus in Bengaluru. The event, held from 9:30 AM to 5:30 PM, received an overwhelming response from the public, with more than 8,000 visitors attending throughout the day. Students, teachers, families, and science…
The Indian Eclipse Expedition, 1922: records from IIA Archives
The scientific community is commemorating the Centenary celebration of the 1922 Indian expedition to Wallal, Australia, to observe a solar eclipse. Albert Einstein published his Theory of Relativity, arguing that gravitational objects with gravitational influence warped spacetime around them. On September 1922, a group of renowned astronomers conducted an expedition on a remote shore in…
Transit of Venus
From Hidden Collection… The recent Transit of Venus that took place on June 6, 2012 drew lot of attention and interest among the public and scientific community. Historically this event is connected to Madras Observatory, as elaborate arrangements were made in the Observatory to observe the Transit of Venus that occurred in 1874 and 1882….
Exploring Knowledge: IIA Library and Archives’ Contribution to Open Day!
The IIA Library and Archives actively participated in the IIA Open Day by setting up a stall to showcase their diverse collection and services. Engaging attendees with informative posters and exhibits, the team highlighted the wealth of resources available at the library and the historical significance of the archives’ materials. The major exhibits highlighted the…
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Sunspot drawings at Kodaikanal Solar Observatory Library
The importance of periodicity in sunspot appearance was well recognized by the mid-19th century. It marked a significant milestone in our understanding of solar activity and its broader implications for the Earth’s climate and space weather. By observing and documenting the cyclical nature of sunspots, astronomers began to unlock the patterns of solar behaviour, laying…