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This is an archive article published on February 24, 2025

Pune: Fergusson College lecture delves into ‘mysterious orgin’ of gold

On August 17, 2017, for the first time in human history, Gravitational Waves from the merger of neutron stars were detected

Fergusson CollegeDr Michitoshi Yoshida explained how elements heavier than iron are formed by a rapid neutron-capture process (r-process), but the site of this process is a long-standing mystery (Express Photo)

A lecture titled Striking Gold with Gravitational Waves was delivered by Dr Michitoshi Yoshida, vice-director of the National Astronomical Observatory of Japan, at Fergusson College, Pune. Organised as part of the Chandra Public Lecture series by Inter-University Centre for Astronomy & Astrophysics (IUCAA), in the talk Yoshida touched upon the mysterious origin of heavier elements like Gold.

Dr Michitoshi Yoshida explained how elements heavier than iron are formed by a rapid neutron-capture process (r-process), but the site of this process is a long-standing mystery. The most probable candidate for this process is the kilonova explosion from a neutron star-neutron star merger, and gravitational waves are good probes to find such mergers.

On August 17, 2017, for the first time in human history, Gravitational Waves from the merger of neutron stars were detected. This gravitational wave was named GW170817 and the evidence of r-process nucleosynthesis was also obtained. However, the birthplace of gold remains unclear, Yoshida added.

The upcoming Laser Interferometer Gravitational-Wave Observatory (LIGO) India project would be crucial for improved accuracy for astronomical measurements, said Yoshida. Speaking to The Indian Express, he said, “With LIGO India, the localisation of the gravitational waves will improve so much. We need as many of these detectors as possible. They can identify a more accurate location of the gravitational wave.”

IUCAA hosted a senior level Japanese delegation from the National Astronomical Observatory of Japan (NAOJ) on Monday. The delegation discussed possibilities of future collaboration with Indian Astronomers.

Soham Shah is a Correspondent with The Indian Express, based in Pune. A journalism graduate with a background in fact-checking, he brings a meticulous and research-oriented approach to his current reporting. Professional Background Role: Correspondent coverig education and city affairs in Pune. Specialization: His primary beat is education, but he also maintains a strong focus on civic issues, public health, human rights, and state politics. Key Strength: Soham focuses on data-driven reporting on school and college education, government reports, and public infrastructure. Recent Notable Articles (Late 2025) His late 2025 work highlights a transition from education-centric reporting to hard-hitting investigative and human-rights stories: 1. Investigations & Governance "Express Impact: Mother's name now a must to download birth certificate from PMC site" (Dec 20, 2025): Reporting on a significant policy change by the Pune Municipal Corporation (PMC) following his earlier reports on gender inclusivity in administrative documents. "44-Acre Mahar Land Controversy: In June, Pune official sought land eviction at Pawar son firm behest" (Nov 9, 2025): An investigative piece on real estate irregularities involving high-profile political families. 2. Education & Campus Life Faculty crisis at SPPU hits research, admin work: 62% of govt-sanctioned posts vacant, over 75% in many depts (Sept 12, 2025): An investigative piece on professor vacancies at Savitribai Phule Pune University. "Maharashtra’s controversial third language policy: Why National Curriculum Framework recommends a third language from Class 6" (July 2): This detailed piece unpacks reasons behind why the state's move to introduce a third language from class 1 was controversial. "Decline in number of schools, teachers in Maharashtra but student enrolment up: Report" (Jan 2025): Analyzing discrepancies in the state's education data despite rising student numbers. 3. Human Rights & Social Issues "Aanchal Mamidawar was brave after her family killed her boyfriend" (Dec 17, 2025): A deeply personal and hard-hitting opinion piece/column on the "crime of love" and honor killings in modern India. "'People disrespect the disabled': Meet the man who has become face of racist attacks on Indians" (Nov 29, 2025): A profile of a Pune resident with severe physical deformities who became the target of global online harassment, highlighting issues of disability and cyber-bullying. Signature Style Soham is known for his civil-liberties lens. His reporting frequently champions the rights of the marginalized—whether it's students fighting for campus democracy, victims of regressive social practices, or residents struggling with crumbling urban infrastructure (as seen in his "Breathless Pune" contributions). He is adept at linking hyper-local Pune issues to larger national conversations about law and liberty. X (Twitter): @SohamShah07 ... Read More


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