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Indian astronomers discover a supercluster of galaxies, name it Saraswati

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Indian astronomers discover a supercluster of galaxies, name it SaraswatiIndian astronomers discover a supercluster of galaxies, name it Saraswati

[vc_row][vc_column][vc_column_text]A team of Indian astronomers have identified an extremely large supercluster of galaxies and have named it Saraswati.

This previously unknown, extremely large supercluster of galaxies, was discovered by a team of astronomers from the Inter University Centre for Astronomy & Astrophysics (IUCAA), and Indian Institute of Science Education and Research (IISER), both in Pune, India, and members of two other Indian universities. The team was led by Joydeep Bagchi from IUCAA, while others included Shishir Sankhyayan, a PhD student at IISER, Pratik Dabhade, an IUCAA research fellow, Joe Jacob of the Newman College, Kerala, and Prakash Sarkar of the National Institute of Technology, Jamshedpur.

The discovery comes close on the heels of another, reported on July 1, of “a large sample of giant radio galaxies” by the same institution. A six-member team of Indian astronomers led by Pratik Dabhade from IUCAA had reported the discovery of 25 extremely rare kind of galaxies called giant radio galaxies (GRGs), known to be the largest known galaxies in the universe. Bagchi was also part of the team.

Saraswati supercluster, located in the direction of constellation Pisces, is one of the largest known structures in the nearby Universe, and is at a distance of 4,000 million (400 crore) light-years away from us. Our own galaxy is part of a Supercluster called the Laniakea Supercluster, announced in 2014 by Brent Tully at the University of Hawaii and collaborators.

Superclusters are the largest coherent structures in the Cosmic Web. A Supercluster is a chain of galaxies and galaxy clusters, bound by gravity, often stretching to several hundred times the size of clusters of galaxies, consisting of tens of thousands of galaxies. The newly discovered ‘Saraswati’ supercluster, for instance, extends over a scale of 600 million light-years and may contain the mass equivalent of over 20 million billion suns. \

The Saraswati supercluster has a total of 43 clusters of galaxies. The typical size of a galaxy here is around 250,000 light years.

Two most massive clusters of galaxies in the Saraswati supercluster : “ABELL 2631” cluster (left) and “ZwCl 2341.1+0000” cluster (right). “ABELL 2631” resides in the core of the Saraswatisupercluster. The Saraswati supercluster has a total of 43 clusters of galaxies.

Two most massive clusters of galaxies in the Saraswati supercluster : “ABELL 2631” cluster (left) and “ZwCl 2341.1+0000” cluster (right). “ABELL 2631” resides in the core of the Saraswatisupercluster. The Saraswati supercluster has a total of 43 clusters of galaxies.

In a press statement, Joydeep Bagchi from IUCAA, the lead author of the paper and co-author Shishir Sankhyayan (PhD scholar at IISER, Pune) said, “We were very surprised to spot this giant wall-like supercluster of galaxies, visible in a large spectroscopic survey of distant galaxies, known as the Sloan Digital Sky Survey (see figure above). This supercluster is clearly embedded in a large network of cosmic filaments traced by clusters and large voids.”

Previously only a few comparatively large superclusters have been reported, for example the ‘Shapley Concentration’ or the ‘Sloan Great Wall’ in the nearby universe, while the ‘Saraswati’ supercluster is far more distant one. “Our work will help to shed light on the perplexing question; how such extreme large scale, prominent matter-density enhancements had formed billions of years in the past when the mysterious Dark Energy had just started to dominate structure formation,” said Bagchi.

“Saraswati” (or “Sarasvati”), a word that has proto-Indo-European roots, is a name found in ancient Indian texts to refer to the major river around which the people of the ancient Indian civilization lived. It is also the name of the celestial goddess who is the keeper of the celestial rivers. In modern India, Saraswati is worshipped as the goddess of knowledge, music, art, wisdom and nature – the muse of all creativity.

Their finding will be published in the latest issue of The Astrophysical Journal, one of the premier research journals of the American Astronomical Society.[/vc_column_text][/vc_column][/vc_row]

India News

Lok Sabha clears bill to levy cess on pan masala and similar goods for health, security funding

The Lok Sabha has passed a bill to impose a cess on pan masala manufacturing units, aiming to create a dedicated revenue source for public health and national security initiatives.

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Nirmala Sitharaman

The Lok Sabha has approved the Health Security se National Security Cess Bill, 2025, paving the way for a new cess on pan masala manufacturing units. The legislation aims to generate dedicated funds for strengthening national security and improving public health, both areas identified as critical national priorities.

Bill aims to create predictable funding stream

Finance Minister Nirmala Sitharaman, responding to the debate before the bill was passed by voice vote, said that the cess will be shared with states because public health falls under the state list.

The new cess will be applied over and above the GST, based on production capacity and machinery used in units manufacturing pan masala and similar goods. The minister clarified that this cess will not affect GST revenue, and that pan masala already attracts the maximum GST slab of 40 per cent.

According to the bill text, the objective is to build a “dedicated and predictable resource stream” to support expenditure related to health and national security.

Sitharaman also mentioned that cess collection as a percentage of gross total revenue currently stands at 6.1 per cent, lower than the 7 per cent average between 2010 and 2014.

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Simone Tata passes away at 95: A look at the visionary who shaped Lakme and modern retail

Simone Tata, the pioneering business leader who built Lakme and helped shape India’s modern retail sector, passed away at 95. Here’s a look at her legacy.

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simone tata

Ratan Tata’s stepmother and celebrated business leader Simone Tata passed away on December 5, 2025, at the age of 95. Known for her pioneering role in building Lakme and transforming India’s retail landscape, she leaves behind a remarkable legacy that redefined Indian consumer culture.

A legacy that shaped Indian business

Simone Tata, born in Geneva in 1930, first came to India at the age of 23. Two years later, in 1955, she married Naval H. Tata and gradually became an integral part of the Tata family’s business vision. Her journey with the Tata Group began in the 1960s, when she was appointed to Lakme—then under Tata Oil Mills.

Under her leadership, Lakme quickly grew into one of India’s most trusted cosmetic brands. She rose to the position of managing director and later chairperson, introducing global formulations and modernising beauty products for the Indian market. Lakme’s rise was also rooted in a strong national vision—launched on former Prime Minister Jawaharlal Nehru’s suggestion to reduce foreign exchange spent on imported makeup.

Transforming retail through Trent and Westside

After Lakme was sold to Hindustan Lever Limited in 1966, Simone moved to Trent, where she helped build one of India’s earliest modern retail chains. This later gave birth to Westside, a brand that has become synonymous with contemporary Indian shopping culture.

She also played a key role in philanthropic initiatives, guiding organisations such as the Sir Ratan Tata Institute and supporting cultural and children-focused foundations.

Family, personal life and final farewell

Simone Tata is survived by her son Noel, daughter-in-law Aloo Mistry, and grandchildren Neville, Maya and Leah. She also drew public attention in recent years for being the only member of the Tata family to attend Cyrus Mistry’s funeral, despite the widely known strained ties between the families.

Her funeral will take place on Saturday morning at the Cathedral of the Holy Name Church in Colaba, Mumbai.

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Centre orders probe into IndiGo crisis, expects normal flight operations in three days

Amid record cancellations by IndiGo, the Centre has ordered a high-level inquiry and expects flight schedules to stabilise by Saturday, with full normalcy in three days.

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indigo

The Centre has initiated a high-level inquiry into the massive disruption of IndiGo’s operations, with the government projecting that flight schedules will begin stabilising by Saturday and full normalisation is expected within three days. The announcement comes as cancellations by the airline crossed 500 for the second consecutive day, severely impacting passengers across major airports.

Civil Aviation Minister Ram Mohan Naidu said the government has directed urgent measures to ensure swift restoration of services. Within minutes of his statement, the aviation regulator DGCA announced the formation of a four-member committee to examine the circumstances leading to the delays and cancellations.

DGCA forms committee as cancellations spark scrutiny

The DGCA said IndiGo was given sufficient time to implement revised Flight Duty Time Limitations (FDTL), yet the airline recorded the highest number of cancellations in November. The regulator added that the pattern suggested gaps in the carrier’s internal oversight and preparedness, warranting an independent probe.

The committee will review the sequence of events that triggered disruptions and recommend measures to prevent a recurrence.

Flight duty rules relaxed; minister defends move

Amid criticism from the Opposition and experts, the DGCA temporarily suspended certain FDTL rules, increasing pilot duty limits from 12 to 14 hours. The changes were widely questioned, with allegations that the government was yielding to pressure from IndiGo.

Naidu defended the decision, stating the move was taken solely to safeguard passengers and that safety standards would not be compromised.
He reiterated that passenger care and convenience remain the top priority.

Assurance of refunds, real-time updates, and support

Highlighting steps taken to ease passenger distress, the minister said airlines must:

  • Provide accurate, real-time updates before travellers leave for airports
  • Initiate automatic refunds for cancelled flights without requiring follow-ups
  • Arrange hotel accommodation for passengers stranded for extended periods

Senior citizens and persons with disabilities have been accorded special priority, including access to lounges and additional assistance. Refreshments and essential services are to be provided to all affected travellers.

Inquiry to determine accountability

The government said the high-level probe will identify what went wrong at IndiGo, establish responsibility, and recommend systemic corrections to ensure such disruptions do not occur again.

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