This item concerns about the rare white light flare recorded in hydrogen alpha at Kodaikanal Observatory. These observations were taken on photographic films or plates and digitized for scientific research purposes.

This item was about the photo of Chintamanny Ragoonatha Chary (1840 - 1880). He was one of the first professional Indian astronomers who was attached to Madras Observatory. He worked with Captain Jacob and Mr.Pogson. He was well known for his work on variable stars, having discovered 2 variable stars, one R Reticuli 1871 and V Cephei 1878. He took an active part in two eclipses, total eclipse of the Sun 1868 and 1871. He was elected a fellow of Royal Astronomical Society in 1872. He brought out a pamphlet on the transit of Venus, This was not only in English but also in several vernacular languages.

The fond contain compilition of Newspaper clipping, photographs and graphs of Uranus ring observed at Kavalur observatory

The fond contain compilation of Photographs, Newspaper Clipping, Pamphlets, Correspondence to Chinthamani Ragoonatha Chary and Transit of Venus.

The fond contain compliation of Photographs, Newspaper Clippings and Correspondence to M.K. Vainu Bappu and Institutes

This item was about the Sunspot spectra taken by John Evershed, where he discovered that there is a radial outflow of gases in a sunspot. This effect is now known as the "Evershed Effect".

This item was about the image of the M.K.Vainu Bappu wandering in the garden.

This item was about the description of minor planet named as 87 Sylvia. This was discovered on 16th May 1866 by N.R.Pogson. The comparison stars employed have all been observed with the Meridian Circle of the Madras Observatory.

This item was about the photo of N.R. Pogson and his first wife, Elizabeth Jane Pogson. It is a black and white picture in which both stood near a table. Mr.Pogson was well dressed, and Mrs. Pogson wore a white gown with a coloured scarf.

This fond contains official letters, photographs, and administrative files related to P. R. Chidambara Ayer during the years 1919-1932.