Astronomers capture most distant star ever seen
Washington: American astronomers have captured the most distant normal star ever observed, some 9 billion light years from Earth, thanks to a rare cosmic alignment.
The study, published on Monday online in the journal Nature Astronomy, revealed the discovery of a star called Icarus, magnified by gravitational lensing by over 2,000 times, reported Xinhua.
Astronomers routinely study galaxies much farther away, visible because they glow with the brightness of billions of stars. They also managed to study supernova, often brighter than the galaxy in which it sits.
However, for a distance of about 100 million light years, the stars in these galaxies are impossible to make out individually.
But a phenomenon called gravitational lensing, the bending of light by massive galaxy clusters in the line of sight, can magnify the distant universe and make dim, far away objects visible.
The single star was discovered in NASA Hubble Space Telescope images taken in late April of 2016 and as recently as April 2017.
"You can see individual galaxies out there, but this star is at least 100 times farther away than the next individual star we can study, except for supernova explosions," said Patrick Kelly at the University of Minnesota, Twin Cities, the paper's first author.
These observations can provide a rare look at how stars evolve, especially the most luminous ones.
"For the first time ever we're seeing an individual normal star - not a supernova, not a gamma ray burst, but a single stable star - at a distance of nine billion light years," said Alex Filippenko, a professor of astronomy at UC Berkeley and one of many co-authors of the report.
The B-type star Icarus is much larger, more massive, hotter and possibly hundreds of thousands of times intrinsically brighter than our Sun.
According to the researchers, an extended lens, like a galaxy cluster, can only magnify a background object up to 50 times, but smaller objects can magnify much more.
A single star in a foreground lens, if precisely aligned with a background star, can magnify the background star thousands of times.
In this case, a star about the size of our sun briefly passed directly through the line of sight between the distant star Icarus and Hubble, boosting its brightness significantly.
Also, if the alignment was perfect, that single star within the cluster turned the light from the distant star into an "Einstein ring": a halo of light created when light from the distant star bends around all sides of the lensing star.
The ring is too small to discern from this distance, but the effect made the star easily visible by magnifying its apparent brightness.
The astronomers predict that Icarus will be magnified many times over the next decade as cluster stars move around, perhaps increasing its brightness as much as 10,000 times.
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US SC rejects 26/11 attack accused Tahawwur Rana’s plea seeking stay on his extradition to India
New York, Apr 7 (PTI): The US Supreme Court has rejected 26/11 Mumbai terror attack accused Tahawwur Rana's appeal seeking a stay on his extradition to India, moving him closer to being handed over to Indian authorities to face justice.
Rana, 64, a Canadian national of Pakistani origin, is currently lodged at a metropolitan detention centre in Los Angeles.
He is known to be associated with Pakistani-American terrorist David Coleman Headley, one of the main conspirators of the 26/11 attacks. Headley conducted a recce of Mumbai before the attacks by posing as an employee of Rana’s immigration consultancy.
Rana had submitted an ‘Emergency Application For Stay Pending Litigation of Petition For Writ of Habeas Corpus' on February 27, 2025, with Associate Justice of the Supreme Court of the United States and Circuit Justice for the Ninth Circuit Elena Kagan.
Kagan had denied the application earlier last month.
Rana had then renewed his ‘Emergency Application for Stay Pending Litigation of Petition for Writ of Habeas Corpus previously addressed to Justice Kagan’, and requested that the renewed application be directed to US Chief Justice John Roberts.
An order on the Supreme Court website noted that Rana's renewed application had been “distributed for Conference” on April 4 and the “application” has been “referred to the Court.”
A notice on the Supreme Court website Monday said that “Application denied by the Court.”
Rana was convicted in the US of one count of conspiracy to provide material support to the terrorist plot in Denmark and one count of providing material support to Pakistan-based terrorist organisation Lashker-e-Taiba which was responsible for the attacks in Mumbai.
New York-based Indian-American attorney Ravi Batra had told PTI that Rana had made his application to the Supreme Court to prevent extradition, which Justice Kagan denied on March 6. The application was then submitted before Roberts, “who has shared it with the Court to conference so as to harness the entire Court’s view.”
The Supreme Court justices are Associate Justice Clarence Thomas, Associate Justice Samuel A. Alito, Jr., Associate Justice Sonia Sotomayor, Associate Justice Elena Kagan, Associate Justice Neil M. Gorsuch, Associate Justice Brett M. Kavanaugh, Associate Justice Amy Coney Barrett, and Associate Justice Ketanji Brown Jackson.
In his emergency application, Rana had sought a stay of his extradition and surrender to India pending litigation (including exhaustion of all appeals) on the merits of his February 13.
In that petition, Rana argued that his extradition to India violates US law and the UN Convention Against Torture "because there are substantial grounds for believing that, if extradited to India, the petitioner will be in danger of being subjected to torture."
"The likelihood of torture in this case is even higher though as petitioner faces acute risk as a Muslim of Pakistani origin charged in the Mumbai attacks,” the application said.
The application also said that his “severe medical conditions” render extradition to Indian detention facilities a “de facto" death sentence in this case.
The US Supreme Court denied Rana's petition for a writ of certiorari relating to his original habeas petition on January 21. The application notes that on that same day, newly-confirmed Secretary of State Marco Rubio had met with External Affairs Minister S Jaishankar.
When Prime Minister Narendra Modi arrived in Washington on February 12 to meet with Trump, Rana’s counsel received a letter from the Department of State, stating that “on February 11, 2025, the Secretary of State decided to authorise” Rana’s "surrender to India,” pursuant to the “Extradition Treaty between the United States and India”.
Rana’s Counsel requested from the State Department the complete administrative record on which Secretary Rubio based his decision to authorize Rana’s surrender to India.
The Counsel also requested immediate information of any commitment the United States has obtained from India with respect to Rana’s treatment. “The government declined to provide any information in response to these requests,” the application said.
It added that given Rana’s underlying health conditions and the State Department’s findings regarding the treatment of prisoners, it is very likely “Rana will not survive long enough to be tried in India".
During a joint press conference with Prime Minister Modi in the White House in February, President Donald Trump announced that his administration has approved the extradition of "very evil" Rana, wanted by Indian law enforcement agencies for his role in the 26/11 Mumbai terror attacks, "to face justice in India”.
A total of 166 people, including six Americans, were killed in the 2008 Mumbai terror attacks in which 10 Pakistani terrorists laid a more than 60-hour siege, attacking and killing people at iconic and vital locations in Mumbai.
