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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Sharad Pawar praised RSS after seeing how it burst fake narrative balloon of LS polls: Fadnavis
Nagpur, Jan 10: Maharashtra Chief Minister Devendra Fadnavis on Friday said NCP (SP) chief Sharad Pawar praised the RSS after realising how the outfit managed to overcome the fake narrative spread by the opposition in the 2024 Lok Sabha polls.
The opposition had claimed BJP wanted to win 400 seats to change the Constitution and end reservations, a narrative which BJP leaders later claimed hit the party hard.
On Pawar praising the RSS recently, the CM said the MVA was successful in creating a fake narrative during the 2024 Lok Sabha polls.
"When assembly polls were approaching, many people from diverse fields who are inspired by the RSS played their role and burst the balloon of this fake narrative. Sharad Pawar saheb is very intelligent. He would have certainly studied this aspect. He realised that this (RSS) is not a regular political power but a nationalist power. In any competition it is good to praise others," he added.
That is why Pawar may have praised the RSS, Fadnavis said.
Speaking at an interaction with senior editor Vivek Ghalsasi at Late Vilasji Fadnis Jivhala programme here, Fadnavis also said he had asked for organisational work when Eknath Shinde was made chief minister in June 2022, but senior leaders asked him to join the government.
He also said Prime Minister Narendra Modi asked him not to behave like an extra-constitutional authority in the government.
He said the decision to become deputy chief minister on the command of the party leadership earned him a lot of praise from the cadre.
After the massive mandate the ruling alliance received in the 2024 assembly polls, Fadnavis said people and party workers would not have been happy if the CM was not from the BJP.
Shinde himself agreed within minutes that the CM must be from the BJP, which itself got 132 seats and was close to a majority of its own in the 288-member assembly, he added.
On Shiv Sena (UBT) chief Uddhav Thackeray meeting him during the winter sessions of the legislature in Nagpur, Fadnavis said he had announced he would not indulge in politics of revenge after becoming CM and all leaders responded positively to it.
On chances of the NCP (SP) and NCP coming closer or reuniting, Fadnavis said, "If you see the developments that took place from 2019 to 2024, I realised never say never and anything can happen. Uddhav Thackeray goes to some other party and Ajit Pawar comes to us. In politics anything can happen though I am not saying this should happen."
He praised BJP leader Arun Gujarati from whom he learnt patience, which he claimed was an important quality in politics along with the ability to take criticism.
In a lighter vein, he said, "I only get angry when I am hungry. If you see me angry then give me something to eat and my anger will go away."
