This item was about the Donohoe Medal of the Astronomical Society of the Pacific presented to M.K.Vainu Bappu in commemoration of the discovery of a comet on 02-07-1949. This medal was awarded to the discoverer of a new comet. This medal was donated by Joseph A. Donohoe, a wealthy businessman from San Francisco. The medal was announced at the July 1889 meeting of the Society.

The book the constellation as seen in Southern India by R. J. Pocock . It was reprinted from the Madras Times. It was published in 1923

The CD contains the digitized book of 26 pages on transit of venus.

This fond encompasses materials centred around the achromatic telescope and its diverse mountings. It features detailed figures of the telescope and incorporates a comprehensive catalogue of instruments crafted by Troughton and Simms.

The item contains six telegraphs from the Telegraph Director in Bombay, with four directed towards Kodaikanal and two towards Chetput(Chennai). One is a request for a copy of the magnetogram taken during the magnetic storm.

This fonds consists of newspaper clippings on the study of supernova phenomena.

This item was a optical instrument named as Stereoscope. Stereoscopes are apparently those optical devices that help to view the two images separately and with relaxed eyes. There are two types of stereoscopes as: lens or pocket stereoscopes and mirror stereoscopes. Lens or pocket stereoscopes are great for viewing the whole overlap area of prints up to 9 cm × 13 cm or parts of larger patterns. On the other hand, mirror stereoscopes were designed to accept standard 23 cm × 23 cm metric air photos and work well with A4/US letter-sized prints. Most models come with magnifying options up to eight times, which is pretty impressive. One cool thing about mirror stereoscopes is that they are large enough to allow the analyst to draw beneath them, so it is possible to trace objects identified in the stereoview with a pen onto one of the images or a transparent overlay. However, it's important to remember that this sketch wouldn't have the geometric properties of a map as it contains all distortions present in the base image.

The book Stellar Motions by William Wallace Campbell in 1913 has about 176 pages. It delves into the movement of stars.

This item was about the total solar eclipse that occurred on 16 February 1980. In this photograph, we can see that only the Sun's corona is visible to us and captured.

The item comprises observations notes of the separate results of Madras Meridian Circle Observation by N. R.Pogson in 1864 and 1875.