Named After Loktak LakeThe newly discovered structure has been named the Loktak Protocluster, inspired by Loktak Lake, the largest freshwater lake in Northeast India and one of Manipur’s most celebrated natural landmarks.
According to the research paper, the name reflects the multiple interconnected overdensity peaks within the cosmic structure, drawing inspiration from the floating islands (“phumdis”) that characterize Loktak Lake.
What Scientists FoundUsing JWST’s advanced imaging capabilities, the team compared galaxies inside the protocluster with galaxies in less dense regions of the Universe.
For Manipur and the broader Northeast region, the naming of a scientifically significant cosmic structure after Loktak Lake represents a symbolic recognition of the region on the global scientific map.
Understanding a Galaxy ProtoclusterA galaxy protocluster is an early-stage concentration of galaxies that has not yet evolved into a mature galaxy cluster.
Dr. Ronaldo Laishram, a Manipuri scientist, leads the discovery of 12.6-Billion-Year-Old ‘Loktak Protocluster’, Offering New Insights into the Early Universe
An ancient cosmic structure discovered using the SILVERRUSH survey and James Webb Space Telescope data has been named after Manipur’s iconic Loktak Lake
By Suman Munshi | IBG NEWS Science Desk
Kolkata/New Delhi: In a landmark achievement for Indian astronomy, Dr. Ronaldo Laishram, an astrophysicist from Manipur, has led an international research team in discovering a 12.6-billion-year-old galaxy protocluster, officially named the “Loktak Protocluster.” The discovery provides astronomers with a rare opportunity to study how the earliest large-scale structures in the Universe began to form.
The research, accepted for publication in The Astrophysical Journal Letters (ApJL), reports the discovery of a Lyman-alpha Emitter (LAE) protocluster at a redshift of approximately z = 4.90, meaning the light observed today began its journey nearly 12.6 billion years ago, when the Universe itself was only about 1.2 billion years old.
“The discovery was officially published in The Astrophysical Journal Letters on 27 April 2026, while it gained widespread international attention following announcements by scientific institutions and media outlets during 25–26 May 2026.”
Why This Discovery Matters
Astronomers describe protoclusters as the construction sites of today’s massive galaxy clusters. Over billions of years, gravity causes these dense concentrations of galaxies and dark matter to evolve into the enormous galaxy clusters observed in the modern Universe.
As Dr. Ronaldo Laishram noted, these protoclusters provide scientists with a unique laboratory to understand how environment influences galaxy formation during the Universe’s earliest epochs.
Named After Loktak Lake
The newly discovered structure has been named the Loktak Protocluster, inspired by Loktak Lake, the largest freshwater lake in Northeast India and one of Manipur’s most celebrated natural landmarks.
According to the research paper, the name reflects the multiple interconnected overdensity peaks within the cosmic structure, drawing inspiration from the floating islands (“phumdis”) that characterize Loktak Lake.
International Collaboration with Advanced Space Observatories
The discovery was made using data from the SILVERRUSH (Systematic Identification of LAEs for Visible Exploration and Reionization Research Using Subaru HSC) survey combined with high-resolution observations from the James Webb Space Telescope (JWST) COSMOS-Web program.
Researchers identified a large-scale overdensity spanning approximately 65 × 36 comoving megaparsecs, comprising four distinct overdensity peaks, with the primary concentration exhibiting nearly four times the surface density of surrounding regions.
What Scientists Found
Using JWST’s advanced imaging capabilities, the team compared galaxies inside the protocluster with galaxies in less dense regions of the Universe.
Their analysis found that galaxies within the Loktak Protocluster are, on average, about 40% larger in rest-frame optical wavelengths than comparable field galaxies, suggesting that dense cosmic environments may accelerate galaxy assembly much earlier than previously understood.
A Proud Moment for Indian Science
The discovery highlights the growing contribution of Indian researchers to frontier astrophysics and demonstrates the important role of international scientific collaboration in exploring the origins of the Universe.
For Manipur and the broader Northeast region, the naming of a scientifically significant cosmic structure after Loktak Lake represents a symbolic recognition of the region on the global scientific map.
Understanding a Galaxy Protocluster
A galaxy protocluster is an early-stage concentration of galaxies that has not yet evolved into a mature galaxy cluster. These structures serve as the building blocks of today’s largest gravitationally bound systems and provide crucial evidence about how matter assembled after the Big Bang.
By studying such ancient structures, astronomers hope to answer fundamental questions about:
The formation of galaxies.
The evolution of large-scale cosmic structures.
The influence of environment on galaxy growth; and
The history of the Universe during its first billion years.
About the Author
Suman Munshi is the Founder and Editorial Leader of IBG NEWS and has more than 25 years of experience in information technology, laboratory informatics (LIMS), digital transformation, regulatory compliance, and digital journalism. A Reuters Digital Journalism Certified journalist with a postgraduate background in Computer Science from the National Institute of Electronics & Information Technology (NIELIT), he writes extensively on science, biotechnology, healthcare policy, artificial intelligence, and emerging technologies, with a focus on evidence-based and research-driven journalism.
