This letter informs about sending John Evershed a diapositive of Mr.Woods's photograph of "Halley" of 1910 April 1921.

The item comprises observations made as Madras Equatorial Observations of Comet Biela; its observations were taken in December 1872 by N.R. Pogson. Comet Biela (official designation: 3D/Biela) was a periodic Jupiter-family comet first recorded in 1772 by Montaigne and Messier and finally identified as periodic in 1826 by Wilhelm von Biela.

The item comprises observations made as Madras Equatorial Observations of Comet Encke; its observations were taken in August 1878 by N.R. Pogson. Encke's Comet (official designation: 2P/Encke) is a periodic comet that completes an orbit of the Sun once every 3.3 years.

This item was about the French father named Richaud spotted the first comet in India in 1689 . He also made an important discovery of the double star Alpha Centauri in the southern skies using a telescope, marking the first use of a telescope in India. Additionally, he was the first to observe Halley's Comet.

This item was about the disappearance of Halley comet after having an interaction with our solar system has created a lot of public enthusiasm. The most awaited celestial visitor seemed to have left a lasting impact. Initial analysis of data collected at Kavalur and other observatories in India reveals that there was a constant change and a large amount of dust and molecules being ejected by the comet. The data collected by Indian and foreign observatories was expected to provide substantial in-depth knowledge of the fabled comet.

This item was about conditional change occured in situation of Halley Comet. Dr J C Bhattacharya, the director of IIA, has been confirmed that there is no possibility of any biological disturbance occurring due to Halley comet. He replied to a question stating that the celestial object seen very near Halley's Comet was not a meteor. He also assured that the institute will release a detailed study on the comet after completing a study of photographs and other research work. Additionally, he informed the public about the different ongoing projects of IIA.

This item was about an important day in astronomy as the Halley's Comet was sighted at the Kavalur observatory. According to Prof. K. R. Sivaraman, the chairman of the Indian Halley observation Program, the sighting on September 3 confirmed the earlier visibility in a photograph taken on August 29 by Dr. K. K. Scaria of IIA using the same telescope at Kavalur. Prof. Sivaraman also mentioned that further scientific observations of the comet would be made once it developed its tail. This is an exciting development for astronomy enthusiasts and researchers alike.

This item was about the more information that was gathered by scientist on comet halley. Prof. U.R. Rao mentioned that ground observations and data from spacecraft launched by various countries have provided information about the size, density, topography, and tail of the comet nucleus. He praised the IIA for capturing different events of the tail through photography.

This item was about where to get information about the Comet Halley. You may want to check out the newly started journal "Communications on Comet Halley" at the ISRO headquarters. According to Dr. M K Tiwari, the convenor of the journal, they have been receiving many inquiries about where and how to see the comet and plan observations. The journal contains data on the comet Halley and is already being distributed to planetariums, amateur astronomy associations, and science clubs. It could be a great resource for anyone interested in learning more about this fascinating comet.

The item contains observation notes of the comet Tempel on 21 and 22 August 1862. Tempel 1 is a Jupiter-family comet.