Khagol-128-OCT-2021

| KHAG L | No. 128 - OCTOBER 2021 | 13 An online Session on Refractor Telescope Making was organized by Brijesh Dixit, from Global Science Club, VIPNET CLUB, during August 21 – September 19, 2021. Tushar Purohit gave a talk and demo on telescope making. In this session, a 50mm diameter telescope was made by 65 students fromall over India. Session on Refractor Telescope Making * All the SciPOP events videos can be found here: https://www.youtube.com/c/IUCAASciPOP/ LIGO – India Education and Public Outreach Activities Gravity Matters Blog Features LIGO-India EPO (LIEPO) published a plethora of posts during July to September 2021, under different sections of the Gravity Matters blog. Some of the highlights include podcasts by distinguished gravitational wave experts, like Sanjeev V. Dhurandhar (IUCAA), and Tarun Souradeep (IISER, Pune), SciArt posters for the NSBH discovery, various GW science articles from GW scientists from across theworld, and Behind-the-Scenes interviewswithGWresearchers and students. Dawn of Multi-Messenger Astronomy! LIGO-India EPO organised a live talk by Parameswaran Ajith (ICTS, Bengaluru) on August 17, 2021, to commemorate the anniversary of GW170817 - the first observation of gravitational-waves from the collision of two neutron stars by the LIGO and Virgo gravitational-wave detectors. The talk targeted both the general public and graduate/postgraduate students and covered what this rare astronomy event has taught us and how it was not only detected in gravitational waves but also seen in light by dozens of telescopes on the ground and in space, thereby giving rise to the new domain of Multi-Messenger Astronomy. At the end, the viewers had the opportunity to ask questions, which were answered by Ajith. The event was coordinated by Debarati Chatterjee, and executed byVaibhav Savant (both fromIUCAA).