NASA's Fermi Gamma-ray Space Telescope spotted an unusually long gamma-ray burst (GRB) on July 2, 2025. It was unlike anything ever since, even though GRBs are quite common. This one lasted seven hours on and off, releasing bursts every few seconds. Scientists were excited to see what was going on and so started observations using on-ground telescopes. They wanted to know its origin and why it was behaving so differently from most GRBs. They concluded that it was the longest gamma-ray burst ever recorded and likely came from an explosion that no one had recorded. Named GRB 250702B, the event travelled at least 99 per cent of the speed of light, sending cosmic material in our direction. The observation was published in The Astrophysical Journal Letters on November 26.&nbsp;Figuring out what was going on in this distant point in space wasn't easy. The researchers turned to the most advanced telescope on Earth, including the Gemini telescopes in Chile and Hawaii, the Very Large Telescope in Chile, the Keck Observatory in Hawaii, and the Hubble Space Telescope. The GRB was observed in various wavelengths of light to learn about its true nature. Various analyses showed that GRB 250702B originated 8 billion light-years away in a dusty galaxy. This is astounding since the radio signal had to pierce through a thick blanket of material that blocks all visible light to reach our solar system.Also Read: <a href="https://www.wionews.com/trending/-ultrahot-jupiter-858-light-years-away-has-two-tails-extending-millions-of-kilometres-1765534026222">'Ultrahot Jupiter' 858 light-years away has two tails extending millions of kilometres — What are they?</a><h2>Where did the radio signal originate?</h2>The telescopes could only detect infrared and high-energy X-ray wavelengths because of the cloud of dust, and the signal was invisible in ordinary light. The cause of the GRB remains a mystery, as the researchers have a few possible explanations, but are unsure which one is correct. "This was the longest gamma-ray burst that humans have observed — long enough that it does not fit into any of our existing models for what causes gamma-ray bursts," Jonathan Carney, lead author of the study, said in a statement.Also Read: <a href="https://www.wionews.com/trending/two-monster-stars-raced-past-our-sun-creating-a-protective-shield-that-keeps-life-on-earth-safe-1765458765240">Two monster stars raced past our Sun, creating a protective shield around Earth</a>&nbsp;The scientists presented three possible events: the death of a massive star, a black hole gorging on a star, or the merger of a helium star and a black hole, which causes an explosion when the black hole moves into the core of the massive star. "But we can't yet tell which explanation is correct," Carney said, adding that GRB 250702B will now act as the primary event to which similar future occurrences will be compared.

NASA detected the most intense gamma-ray burst (GRB) in July 2025. While most such deep space signals last only a few seconds, this one went on for hours. Researchers have been able to figure out the starting point of the GRB, although the reason remains a mystery.

NASA's Fermi Gamma-ray Space Telescope spotted an unusually long gamma-ray burst (GRB) on July 2, 2025. It was unlike anything ever since, even though GRBs are quite common. This one lasted seven hours on and off, releasing bursts every few seconds. Scientists were excited to see what was going on and so started observations using on-ground telescopes. They wanted to know its origin and why it was behaving so differently from most GRBs. They concluded that it was the longest gamma-ray burst ever recorded and likely came from an explosion that no one had recorded. Named GRB 250702B, the event travelled at least 99 per cent of the speed of light, sending cosmic material in our direction. The observation was published in The Astrophysical Journal Letters on November 26. Figuring out what was going on in this distant point in space wasn't easy. The researchers turned to the most advanced telescope on Earth, including the Gemini telescopes in Chile and Hawaii, the Very Large Telescope in Chile, the Keck Observatory in Hawaii, and the Hubble Space Telescope. The GRB was observed in various wavelengths of light to learn about its true nature. Various analyses showed that GRB 250702B originated 8 billion light-years away in a dusty galaxy. This is astounding since the radio signal had to pierce through a thick blanket of material that blocks all visible light to reach our solar system. Also Read: 'Ultrahot Jupiter' 858 light-years away has two tails extending millions of kilometres — What are they? Where did the radio signal originate? The telescopes could only detect infrared and high-energy X-ray wavelengths because of the cloud of dust, and the signal was invisible in ordinary light. The cause of the GRB remains a mystery, as the researchers have a few possible explanations, but are unsure which one is correct. "This was the longest gamma-ray burst that humans have observed — long enough that it does not fit into any of our existing models for what causes gamma-ray bursts," Jonathan Carney, lead author of the study, said in a statement. Also Read: Two monster stars raced past our Sun, creating a protective shield around Earth The scientists presented three possible events: the death of a massive star, a black hole gorging on a star, or the merger of a helium star and a black hole, which causes an explosion when the black hole moves into the core of the massive star. "But we can't yet tell which explanation is correct," Carney said, adding that GRB 250702B will now act as the primary event to which similar future occurrences will be compared.

NASA detected the most intense gamma-ray burst (GRB) in July 2025. While most such deep space signals last only a few seconds, this one went on for hours. Researchers have been able to figure out the starting point of the GRB, although the reason remains a mystery.

Mysterious deep space radio signal detected in 2025 has no reasonable explanation

A new study published in The Astrophysical Journal Letters talks about the discovery of mysterious gamma rays that scientists are struggling to explain. Typically, such bursts happen when a star dies. They unleash a huge amount of energy, more than anything ever released in the universe. This gamma ray burst is being repeated multiple times in a single day. It indicates a stellar death that happened not once, not twice, but several times. How is it possible for a star to come back to life after being annihilated? The study authors are confused about this event. Martin-Carrillo, an astronomer at University College Dublin, Ireland, and coauthor of the study, said, "This event is unlike any other seen in 50 years of GRB observations. "GRBs are catastrophic events, so they are expected to go off just once because the source that produced them does not survive the dramatic explosion." Also Read: <a href="https://www.wionews.com/science/what-is-an-einstein-cross-fifth-image-in-rare-cosmic-formation-points-fingers-at-a-mysterious-hidden-force-1758179626678">Dark matter breakthrough? Einstein Cross with five images stuns scientists. What is it?</a>&nbsp;This is not the first time that astronomers have seen a star exploding multiple times. That happened in the case of a binary star system where a white dwarf and an ordinary star are locked to each other. When they get too close, the white dwarf starts drawing the energy of the star, ultimately triggering a thermonuclear explosion that kills them both. But before the main supernova, several smaller blasts occur. But that won't generate a double or triple GRB. Also Read: <a href="https://www.wionews.com/science/scientists-identify-trappist-1e-as-a-potential-earth-like-world-here-s-why-1757851563033">Scientists identify TRAPPIST-1e as a potential Earth-like world, here’s why</a><h2>Longer and periodic gamma-ray burst</h2>This is why GRB 250702B has stumped scientists ever since it was first spotted on July 2 by NASA's Fermi Gamma-ray Space Telescope. There were three distinct bursts. Surprisingly, Einstein Probe, an X-ray telescope, also detected the gamma ray a day before Fermi. "This is 100-1000 times longer than most GRBs," co-lead author and Radboud University astronomer Andrew Levan said in the statement. Another aspect, as pointed out by Martin-Carrillo, is that the gamma ray is periodic, something they have never seen happen before. To learn its origins, scientists used a wide-field infrared camera called the HAWK-I on the Very Large Telescope in Chile. It found that the gamma ray was coming from a distance of billions of light-years.&nbsp;A few possible theories floated by the experts include a massive star that seems could be imploding under its own weight as some material keeps it powered, Martin-Carrillo said. However, in this case, the GRB would only last a few seconds. It could also be a scenario where a black hole is eating a star. But going by the GRB, it would have to be an "unusual" star and an equally "unusual" black hole. But there are only speculations, and it might be a long time before the true origins of the gamma ray are revealed.&nbsp;&nbsp;

A strange gamma ray burst has baffled scientists who do not know what it is. It is unlike anything they have ever recorded. The cosmic event likely occurred billions of light years away, and the rays managed to reach Earth, implying it was extremely powerful. 

A new study published in The Astrophysical Journal Letters talks about the discovery of mysterious gamma rays that scientists are struggling to explain. Typically, such bursts happen when a star dies. They unleash a huge amount of energy, more than anything ever released in the universe. This gamma ray burst is being repeated multiple times in a single day. It indicates a stellar death that happened not once, not twice, but several times. How is it possible for a star to come back to life after being annihilated? The study authors are confused about this event. Martin-Carrillo, an astronomer at University College Dublin, Ireland, and coauthor of the study, said, "This event is unlike any other seen in 50 years of GRB observations. "GRBs are catastrophic events, so they are expected to go off just once because the source that produced them does not survive the dramatic explosion." Also Read: Dark matter breakthrough? Einstein Cross with five images stuns scientists. What is it? This is not the first time that astronomers have seen a star exploding multiple times. That happened in the case of a binary star system where a white dwarf and an ordinary star are locked to each other. When they get too close, the white dwarf starts drawing the energy of the star, ultimately triggering a thermonuclear explosion that kills them both. But before the main supernova, several smaller blasts occur. But that won't generate a double or triple GRB. Also Read: Scientists identify TRAPPIST-1e as a potential Earth-like world, here’s why Longer and periodic gamma-ray burst This is why GRB 250702B has stumped scientists ever since it was first spotted on July 2 by NASA's Fermi Gamma-ray Space Telescope. There were three distinct bursts. Surprisingly, Einstein Probe, an X-ray telescope, also detected the gamma ray a day before Fermi. "This is 100-1000 times longer than most GRBs," co-lead author and Radboud University astronomer Andrew Levan said in the statement. Another aspect, as pointed out by Martin-Carrillo, is that the gamma ray is periodic, something they have never seen happen before. To learn its origins, scientists used a wide-field infrared camera called the HAWK-I on the Very Large Telescope in Chile. It found that the gamma ray was coming from a distance of billions of light-years. A few possible theories floated by the experts include a massive star that seems could be imploding under its own weight as some material keeps it powered, Martin-Carrillo said. However, in this case, the GRB would only last a few seconds. It could also be a scenario where a black hole is eating a star. But going by the GRB, it would have to be an "unusual" star and an equally "unusual" black hole. But there are only speculations, and it might be a long time before the true origins of the gamma ray are revealed.

A strange gamma-ray burst has baffled scientists who don't know what it is. It is unlike anything they have ever recorded. The cosmic event likely occurred billions of light-years away, and the rays managed to reach Earth, implying it was extremely powerful.&nbsp;

One star, multiple deaths? Mysterious gamma-ray burst that keeps repeating stumps scientists

NASA’s compact satellite BurstCube has embarked on its journey to the International Space Station,&nbsp;laboratory for scientific research.&nbsp;The spacecraft hitched a ride aboard SpaceX’s 30th Commercial Resupply Services mission.&nbsp;

It was launched at 4:55 pm EDT on Thursday (Mar 21) from Launch Complex 40 at Cape Canaveral Space Force Station in Florida, US.&nbsp;BurstCube is a NASA mission designed to detect and locate gamma-ray bursts (GRBs).

GRBs are powerful explosions that occur in distant galaxies and are among the most energetic events in the universe. BurstCube is aiming to study these bursts to better understand their origins and properties.

Upon reaching the station, BurstCube will be unpacked and subsequently deployed into orbit.&nbsp;

“BurstCube may be small, but in addition to investigating these extreme events, it’s testing new technology and providing important experience for early career astronomers and aerospace engineers,” remarked Jeremy Perkins, BurstCube’s principal investigator at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.

Also Read |&nbsp;<a href="https://www.wionews.com/science/charon-plutos-planetary-bestie-goes-viral-as-nasa-shares-stunning-snapshot-703738">Charon, Pluto's planetary bestie goes viral as NASA shares stunning snapshot</a>

Short gamma-ray bursts (GRBs) are thought to be formed by the merger of two neutron stars. There stars spiral inward and eventually merge due to gravitational wave emission.

These bursts play a role in the creation of heavy elements like gold or iodine.&nbsp;During a GRB, particularly those associated, extremely high-energy conditions are present. These conditions, including high temperatures and densities, facilitate the production of heavy elements.&nbsp;

BurstCube's detectors are strategically positioned to enable wide-area detection and localisation of events, as per research scientist&nbsp; Israel Martinez at the University of Maryland, College Park, and Goddard.&nbsp;

“Our current gamma-ray missions can only see about 70 per cent of the sky at any moment because Earth blocks their view. Increasing our coverage with satellites like BurstCube improves the odds we’ll catch more bursts coincident with gravitational wave detections.”

Also Read |&nbsp;<a href="https://www.wionews.com/science/water-plumes-collected-from-jupiters-moon-europa-may-bear-signs-of-alien-life-703701">Water plumes collected from Jupiter’s moon Europa may bear signs of alien life</a>

The satellite’s primary instrument is adept at capturing gamma rays within the energy range of 50,000 to 1 million electron volts.&nbsp;

WATCH | Study: Climate change-led temperature rise to boost inflation

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Julie Cox, a BurstCube mechanical engineer at Goddard said, “We were able to order many of BurstCube’s parts, like solar panels and other off-the-shelf components, which are becoming standardised for CubeSats."

“That allowed us to focus on the mission’s novel aspects, like the made-in-house components and the instrument, which will demonstrate how a new generation of miniaturised gamma-ray detectors work in space.”

(With inputs from agencies)

NASA’s compact satellite BurstCube has embarked on its journey to the International Space Station, laboratory for scientific research. The spacecraft hitched a ride aboard SpaceX’s 30th Commercial Resupply Services mission.

NASA’s compact satellite BurstCube has embarked on its journey to the International Space Station, laboratory for scientific research. The spacecraft hitched a ride aboard SpaceX’s 30th Commercial Resupply Services mission. It was launched at 4:55 pm EDT on Thursday (Mar 21) from Launch Complex 40 at Cape Canaveral Space Force Station in Florida, US. BurstCube is a NASA mission designed to detect and locate gamma-ray bursts (GRBs). GRBs are powerful explosions that occur in distant galaxies and are among the most energetic events in the universe. BurstCube is aiming to study these bursts to better understand their origins and properties. Upon reaching the station, BurstCube will be unpacked and subsequently deployed into orbit. “BurstCube may be small, but in addition to investigating these extreme events, it’s testing new technology and providing important experience for early career astronomers and aerospace engineers,” remarked Jeremy Perkins, BurstCube’s principal investigator at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. Also Read | Charon, Pluto's planetary bestie goes viral as NASA shares stunning snapshot Short gamma-ray bursts (GRBs) are thought to be formed by the merger of two neutron stars. There stars spiral inward and eventually merge due to gravitational wave emission. These bursts play a role in the creation of heavy elements like gold or iodine. During a GRB, particularly those associated, extremely high-energy conditions are present. These conditions, including high temperatures and densities, facilitate the production of heavy elements. BurstCube's detectors are strategically positioned to enable wide-area detection and localisation of events, as per research scientist Israel Martinez at the University of Maryland, College Park, and Goddard. “Our current gamma-ray missions can only see about 70 per cent of the sky at any moment because Earth blocks their view. Increasing our coverage with satellites like BurstCube improves the odds we’ll catch more bursts coincident with gravitational wave detections.” Also Read | Water plumes collected from Jupiter’s moon Europa may bear signs of alien life The satellite’s primary instrument is adept at capturing gamma rays within the energy range of 50,000 to 1 million electron volts. WATCH | Study: Climate change-led temperature rise to boost inflation × Julie Cox, a BurstCube mechanical engineer at Goddard said, “We were able to order many of BurstCube’s parts, like solar panels and other off-the-shelf components, which are becoming standardised for CubeSats." “That allowed us to focus on the mission’s novel aspects, like the made-in-house components and the instrument, which will demonstrate how a new generation of miniaturised gamma-ray detectors work in space.” (With inputs from agencies)

NASA’s shoebox-sized ‘BurstCube’ satellite set to study short gamma-ray bursts

The National Aeronautics and Space Administration (NASA) has detected the brightest gamma-ray burst of all time. In a statement issued last Thursday (June 8), NASA said, "When scientists detected the gamma-ray burst known as GRB 221009A on Oct.

The National Aeronautics and Space Administration (NASA) has detected the brightest gamma-ray burst of all time. In a statement issued last Thursday (June 8), NASA said, "When scientists detected the gamma-ray burst known as GRB 221009A on Oct. 9, 2022, they dubbed it the brightest of all time, or BOAT." Citing follow-up studies, NASA said the GRB 221009A is 70 times brighter and far more energetic than the previous record holder. While scientists don’t yet understand why, they received a tantalizing clue from NASA’s NuSTAR (Nuclear Spectroscopic Telescope Array) observatory. According to a study published in the journal Science Advances, scientists used NuSTAR observations of the event to show how the collapsing star ejected a jet of material that had a shape not previously observed among gamma-ray burst jets, as well as other unique characteristics. The source of these distinctions may be the progenitor star, the study said, adding it is also possible that an entirely different mechanism launches the very brightest jets into space. 'Event so much brighter than any gamma-ray burst' Brendan O’Connor, the lead author of the study said the October 9, 2022 event was so much brighter and more energetic than any gamma-ray burst seen before. “Then, when we analyzed the NuSTAR data, we realized that it also has this unique jet structure. And that was really exciting because we have no way of studying the star that produced this event; it’s gone now. But we now have some data giving us clues about how it exploded,” O'Connor, an astronomer at George Washington University, added. What are gamma rays? Gamma rays are high-energy photons that are produced by some of the most violent events in the universe. They are the most energetic form of light in the universe yet invisible to the human eye. All known gamma-ray bursts have originated in galaxies outside our Milky Way but are bright enough to be spotted billions of light-years away, as per NASA. "Some blink into existence and last less than two seconds, while so-called long gamma-ray bursts typically radiate gamma rays for a minute or more. These objects can radiate other wavelengths for weeks," the American space agency added. Details about the GRB 221009A NASA said in the statement that the GRB 221009A- a long gamma-ray burst- was so bright that it effectively blinded most gamma-ray instruments in space. American scientists were able to reconstruct the event with data from NASA’s Fermi Gamma-ray Space Telescope to determine its actual brightness. "Similar to other gamma-ray bursts, GRB 221009A had a jet that erupted from the collapsing star like it was shot into space from a fire hose, with gamma rays radiating from the hot gas and particles at the jet’s core," the statement said. However, GRB 221009A's jet stood out in a few ways. NASA said that in just about every previously observed gamma-ray burst, the jet remained remarkably compact and there was little to no stray light or material outside the narrow beam. The jet had a narrow core with wider, sloping sides. The jet from the BOAT was unique in one important way- the energy of the material in GRB 221009A also varied, meaning that instead of all the material in the jet having the same energy, the energy of the material changed with distance from the jet’s core, NASA further said and highlighted this had never been observed in a long gamma-ray burst jet earlier. WATCH WION LIVE HERE You can now write for wionews.com and be a part of the community. Share your stories and opinions with us here.

NASA detects brightest gamma-ray burst of all time, it's 70 times brighter than previous record holder

Gamma-ray bursts are so powerful they could vaporise the Earth from 200 light-years away. Gamma-ray bursts are thought to occur when a massive star runs out of nuclear fuel and its core collapses. Now, NASA has announced that on 9 October 2022, satellites detected an extremely bright gamma-ray signal that suddenly exploded from the constellation of sagitta; it lasted hundreds of seconds.

Could Gamma-ray burst kill off life on Earth?

Astronomers have reported that a gamma-ray explosion recorded last year in October was possibly the brightest ever to have hit Earth since the beginning of human civilisation. Researchers said that the extragalactic outburst was 70 times brighter than any other such eruption recorded to date. The gamma-ray explosion had sent light moving through the inner solar system, making astronomers curious about the occurrence.

Gamma-ray bursts, or GRBs, are the most powerful explosions to happen in the universe. They happen either as a result of collisions of superdense neutron stars or because of a massive star collapsing and dying, leading to the birth of black holes. The former ones are short GRBs, while the latter is long GRBs.

The gamma-ray explosion, known as GRB 221009A, released radiation that enveloped the Earth on October 9, 2022. The light saturated gamma-ray detectors on several space telescopes and was nicknamed the BOAT, or "brightest of all time."

Now the BOAT has proved further why it is truly the greatest of all time. Scientists studying the rays from the gamma-ray&nbsp;explosion&nbsp;have concluded that nothing like this has ever happened before, at least ever since humans started roaming the planet. "It is just an absolutely monstrous burst. It is extremely extraordinary; we've never seen anything remotely close to it," Eric Burns, an assistant professor of physics and astronomy at Louisiana State University, said at a press conference in Hawaii.

It is a once-in-10,000-year event, Burns added.

"The BOAT is a once-in-10,000-year event," Burns added. "So, there's a reasonable chance this is the brightest gamma-ray burst to hit Earth since human civilisation began."

"So, you have the core collapse; this creates a black hole. The black hole powers jets that propagate out at just under the speed of light," Burns said.&nbsp;

"As these jets go out, they release their energy in the form of prompt gamma-ray burst emission," he added. "This is followed by what's known as afterglow, and at later times, the energy deposited into that star powers a supernova explosion."

The BOAT gamma-ray burst was located about 1.9 billion light-years from Earth, and now scientists are waiting for supernova to emerge here. However, they are still looking for one as NASA's James Webb Space Telescope and Hubble Space Telescope haven't been able to find one yet.

"If it's there, it's very faint," Andrew Levan, a professor of astrophysics, said in a statement released by NASA on Tuesday. "We plan to keep looking, but it's possible the entire star collapsed straight into the black hole instead of exploding."

(With inputs from agencies)

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Astronomers have reported that a gamma-ray explosion recorded last year in October was possibly the brightest ever to have hit Earth since the beginning of human civilisation.

Astronomers have reported that a gamma-ray explosion recorded last year in October was possibly the brightest ever to have hit Earth since the beginning of human civilisation. Researchers said that the extragalactic outburst was 70 times brighter than any other such eruption recorded to date. The gamma-ray explosion had sent light moving through the inner solar system, making astronomers curious about the occurrence. Gamma-ray bursts, or GRBs, are the most powerful explosions to happen in the universe. They happen either as a result of collisions of superdense neutron stars or because of a massive star collapsing and dying, leading to the birth of black holes. The former ones are short GRBs, while the latter is long GRBs. The gamma-ray explosion, known as GRB 221009A, released radiation that enveloped the Earth on October 9, 2022. The light saturated gamma-ray detectors on several space telescopes and was nicknamed the BOAT, or "brightest of all time." Now the BOAT has proved further why it is truly the greatest of all time. Scientists studying the rays from the gamma-ray explosion have concluded that nothing like this has ever happened before, at least ever since humans started roaming the planet. "It is just an absolutely monstrous burst. It is extremely extraordinary; we've never seen anything remotely close to it," Eric Burns, an assistant professor of physics and astronomy at Louisiana State University, said at a press conference in Hawaii. It is a once-in-10,000-year event, Burns added. "The BOAT is a once-in-10,000-year event," Burns added. "So, there's a reasonable chance this is the brightest gamma-ray burst to hit Earth since human civilisation began." "So, you have the core collapse; this creates a black hole. The black hole powers jets that propagate out at just under the speed of light," Burns said. "As these jets go out, they release their energy in the form of prompt gamma-ray burst emission," he added. "This is followed by what's known as afterglow, and at later times, the energy deposited into that star powers a supernova explosion." The BOAT gamma-ray burst was located about 1.9 billion light-years from Earth, and now scientists are waiting for supernova to emerge here. However, they are still looking for one as NASA's James Webb Space Telescope and Hubble Space Telescope haven't been able to find one yet. "If it's there, it's very faint," Andrew Levan, a professor of astrophysics, said in a statement released by NASA on Tuesday. "We plan to keep looking, but it's possible the entire star collapsed straight into the black hole instead of exploding." (With inputs from agencies) WATCH WION LIVE HERE You can now write for wionews.com and be a part of the community. Share your stories and opinions with us here.

'Absolutely monstrous': Brightest gamma-ray burst was a 1-in-10,000-years event, scientists say

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Mysterious deep space radio signal detected in 2025 has no reasonable explanation

Repeating gamma-ray burst 1,000 times longer — One star, multiple deaths?

NASA’s shoebox-sized ‘BurstCube’ satellite set to study short gamma-ray bursts

NASA detects brightest gamma-ray burst of all time, it's 70 times brighter than previous record holder

Could Gamma-ray burst kill off life on Earth?

'Absolutely monstrous': Brightest gamma-ray burst was a 1-in-10,000-years event, scientists say