Mukherjee who was then editing the 'Star Atlas'. Observation of Halley's Comet In the year of 1910 (April–July), Chandra observed the Halley's Comet from Jessore with his small binocular as he did not have any powerful binocular or other helping tool. He wrote the details information of his observation in the 'Hindu Magazine' of that time. Telescope collection In 1912, Chandra purchased a 3-inch lens telescope from England for 13 pounds. Contributions in astronomy From then on, he continued regular observation of variable stars with the help of the 'Star Atlas' by Kalinath Mukhajee. He communicated a total of 37,215 trained-eye observations up to 1954. The value of his prodigious work lies in the fact that he worked at a longitude far from that of most observers, greatly improving the temporal completeness of the observational records for the stars he observed. Discovery of nova It was June 7, 1918. Chandra used to observe stars most of the nights at that time. He suddenly noticed a bright star. He tried to match it with the Star Map but did not find any. He observed it for the next few days and came to decision that it is a new one. In the language of astronomy it was a Nova. He published the detail description of this Nova in the 'Probashi' magazine of that time. Later this nova was named as 'Nova Aquila-3'. Membership of AAVSO Chandra sent his observatory report to Edward Charles Pickering who was then a researcher of Harvard Space Observatory. Pickering gave him a lot of inspiration and sent some books to him. He invited him to become a member of 'American Association of Variable Star Observers (AAVSO)'. He became a member of AAVSO which, in 1926, gave him a 6-inch aperture telescope directly sent from USA. The first international member of the AAVSO was Giovanni B. Lacchini of Faenza, Italy. In his lifetime Lacchini contributed over 58,000 observations to the AAVSO. Among other early international observers was Radha G. Chandra who made over 49,700 observations up to 1954. Retirement It was 1954 when Chandra finally retired from observing at the age of 76. He was asked to pass on the AAVSO telescope to Manali Kallat Vainu Bappu (1927–82) then at Nainital. The Elmer-Chandra telescope, one of the very few American telescopes in British India is now at Kavalur Observatory. This most dedicated observer of the time worked