2025 125 Years of Kodaikanal Solar Observatory ₹5 Stamp Block of 4 – India Post

Celebrate India's remarkable contribution to solar astronomy with this 2025 commemorative postage stamp block of four, issued by India Post on 16 May 2025 to mark 125 years of the Kodaikanal Solar Observatory. Established in 1899 in the Palani Hills of Tamil Nadu, the observatory is renowned for its historic solar observations and valuable records of sunspot activity. The stamp honours India's scientific heritage and achievements in solar physics. An excellent addition to Indian philately collections, astronomy-themed stamp albums and modern commemorative postage stamp collections.