The book "An Elementary Treatise on the Lunar Theory with a Brief Sketch of the History of the Problem" was written by Hugh Godfray. Hugh Godfray (c1821-1877) first published his treatise in 1853, a year after he graduated from St. John’s College. Lunar theory would become central to George Darwin’s work, and he went on to form crucial theories regarding lunar acceleration, earth retardation, the earth-moon system, and the genesis of the moon. It was published in 1987

The fond contain correspondance of M. K. Vainu Bappu with C. V. Raman and mentors, donated by Mrs. Yemuna Bappu to IIA archives.

This letter seeking a clear spell of an hour in the Sagittarius region and a spectrum of Upsilon Sagittari.

This item was about the French Father Richaud made the first astronomical discovery on Indian soil. In 1689, when he discovered the double star Alpha Centauri using a 12-foot telescope in Pondicherry. He also determined the latitude and longitude of Pondicherry.

This item was about the investigation conducted by Society, they have found a possible relationship between C V Raman and S Chandrasekhar. According to their findings, S Chandrasekhar, who recently won the Nobel Prize, was a nephew of Sir C V Raman. The investigation also revealed that every member of Sir Raman's family has made some contribution to society in different ways.

The fond contain newspaper clippings on Astronomy: Ionosphere reading of stars. This states that the Indian astrophysicists propose that the Earth's ionosphere disturbances caused by X-ray bursts (XAY BIRT) could signal stellar activity. This alerts astronomers to phenomena like Sc X1's X-ray emissions. Detecting the impact of stars on the ionosphere is challenging due to background interference, with debates on ionization and magnetic field effects. Dr. Sastri and Dr. Murthy's experimental study reveals a significant magnetic field increase during a Sc X1 flare. Understanding the ionosphere's response to X-rays, including gamma rays from catastrophic stellar events, may offer a distinctive detection method for monitoring space events, aiding astronomers in decoding cosmic phenomena efficiently.

The item was about the IIA astronomers detected an expanding disc or a shell of gas around the supernova 1987A in the large Magellanic cloud with a velocity of 650km per second.

This item was about a supernova, an awesome explosion of a star, which occurred 186,000 years ago, was sighted by scientists from kavalur observatory. It is significant in that this is the first time it is known to have occurred in the large magellanic cloud.

This item was about the observations of thirty one variable stars observed by late N.R. Pogson. In this, he had described the different positions and observations with figured illustrations of variable stars.

The Book On the discovery of The Periodic Law and on relations among the atomic weights written by John Alexander Reina Newlands was published in 1884. It has 70 pages.