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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

Congress, BJP attack Bhagwant Mann over remarks on Punjab blasts

Congress and BJP have jointly criticised Punjab CM Bhagwant Mann after he linked recent blasts near defence sites to political motives, triggering a controversy.

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Bhagwant Mann

A political row has erupted in Punjab after Chief Minister Bhagwant Mann linked recent blast incidents to political motives, drawing sharp criticism from both the Congress and the Bharatiya Janata Party (BJP).

The controversy follows two low-intensity explosions reported within a short span of time — one near the Border Security Force (BSF) headquarters in Jalandhar and another close to an army cantonment area in Amritsar. The incidents raised concerns over security, particularly given the sensitive nature of the locations.

In response, Mann suggested that the blasts could be part of a larger political strategy. His remarks triggered a strong backlash, with opposition parties accusing him of politicising a serious security issue.

Leaders from the Congress criticised the Chief Minister’s statement, calling it inappropriate and alleging that such comments undermine the gravity of the situation. They stressed that matters related to national security should be handled with caution and responsibility.

The BJP also joined the criticism, questioning the basis of Mann’s claims and urging the state government to focus on investigation and law enforcement instead of making political allegations.

The developments have led to an unusual moment where both Congress and BJP appear aligned in their criticism of the Aam Aadmi Party-led government in the state.

Meanwhile, the blasts themselves have intensified concerns over safety in border regions, with authorities continuing their investigation into the incidents. No casualties were reported, but the proximity to defence establishments has made the issue particularly sensitive.

The episode has further escalated political tensions in the state, with security and accountability emerging as key points of debate.

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India News

Himanta Biswa Sarma resigns as Assam chief minister, oath ceremony likely after May 11

Himanta Biswa Sarma resigns as Assam Chief Minister after BJP-led NDA’s victory. He will continue as caretaker CM until the new government is sworn in after May 11.

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Himanta sharma

Assam Chief Minister Himanta Biswa Sarma resigned from his post on Wednesday, paving the way for the formation of a new government after the BJP-led NDA secured a decisive victory in the 2026 Assembly elections.

Sarma submitted his resignation to Governor Lakshman Prasad Acharya at Lok Bhawan in Guwahati. The Governor accepted the resignation and asked him to continue as the caretaker Chief Minister until the new government takes charge.

The resignation comes after the NDA’s strong electoral performance, where the alliance won a clear majority in the 126-member Assembly, ensuring its return to power for another term.

Oath ceremony expected after May 11

Speaking to reporters after submitting his resignation, Sarma said the swearing-in ceremony for the new government is likely to be held after May 11.

He indicated that Prime Minister Narendra Modi has been invited to attend the ceremony but is unavailable until May 11, which has influenced the tentative schedule.

Decision on next chief minister soon

Sources suggest that central observers, including senior BJP leaders, are expected to arrive shortly to oversee the selection of the legislature party leader. The newly elected MLAs will then decide on the next Chief Minister.

Despite the formal resignation, party sources indicate that Sarma is likely to continue in the role for another term, given the BJP’s strong mandate in the state.

The move marks the beginning of the government formation process in Assam following the election results declared earlier this week.

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Rahul Gandhi and Vijay alliance took shape through backchannel talks, early signals from Congress leaders

Congress outreach and political calculations led to Rahul Gandhi and Vijay coming together after the Tamil Nadu 2026 election results.

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The coming together of Rahul Gandhi and actor-politician Vijay in Tamil Nadu after the 2026 Assembly elections was not sudden, but the result of behind-the-scenes political manoeuvring and early signals within the Congress.

According to media reports, some leaders in the Tamil Nadu Congress had already sensed the scale of Vijay’s surge during the campaign, anticipating what was later described as a “wave” in favour of his party.

After the results, where Vijay’s Tamilaga Vettri Kazhagam (TVK) emerged as the single largest party but fell short of a majority, communication channels between the Congress leadership and Vijay quickly became active.

A key moment in this evolving political equation was a phone call from Rahul Gandhi to Vijay, congratulating him on the party’s strong performance. The conversation was seen as more than a courtesy, signalling the possibility of cooperation at a time when government formation required additional support.

Reports indicate that discussions within Congress weighed the political benefits of supporting Vijay, especially given the shifting dynamics in the state where traditional dominance by major Dravidian parties has been challenged.

With TVK needing allies to cross the majority mark, Congress emerged as a potential partner, leading to a broader political realignment in the state. This development also triggered tensions within opposition alliances, highlighting the strategic importance of the decision.

The evolving partnership reflects a mix of electoral pragmatism and changing voter sentiment, particularly the growing influence of younger voters, which leaders acknowledged as a key factor in the election outcome.

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