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Astronomers have discovered a new way that stars can die. In a study published in the journal Nature Astronomy, experts have worked out that a minute-long gamma-ray burst of light, which occured in 2019 and evidence a star dying, happened because stars collided within the densely crowded environment near the supermassive black hole at the centre of an ancient galaxy. Normally gamma-ray bursts (GRB) last around two seconds and happen when stars collapse. “For every hundred events that fit into the traditional classification scheme of gamma-ray bursts, there is at least one oddball that throws us for a loop,” said study coauthor Wen-fai Fong, assistant professor of physics and astronomy at Northwestern University’s Weinberg College of Arts and Sciences, in a statement. “However, it is these oddballs that tell us the most about the spectacular diversity of explosions that the universe is capable of.” Over time, astronomers have observed three main ways that stars can die, depending on their size. Lower mass stars like our sun shed their outer layers as they age, eventually becoming dead white dwarf stars. Sign up to our free Indy100 weekly newsletter Massive stars burn through the fuel-like elements at their core and shatter in explosions called supernovas. Doing so can leave behind dense remnants like neutron stars or result in the creation of black holes. A third form of star death results when neutron stars or black holes begin to orbit one another in a binary system and spiral closer to one another until they collide and explode. But the new observation suggests a fourth type of death. “Our results show that stars can meet their demise in some of the densest regions of the universe, where they can be driven to collide,” said lead study author Andrew Levan, an astrophysics professor at Radboud University in Nijmegen, Netherlands, in a statement. “This is exciting for understanding how stars die and for answering other questions, such as what unexpected sources might create gravitational waves that we could detect on Earth.” “The lack of a supernova accompanying the long GRB 191019A tells us that this burst is not a typical massive star collapse,” said study coauthor Jillian Rastinejad, a doctoral student of astronomy at Northwestern, in a statement. “The location of GRB 191019A, embedded in the nucleus of the host galaxy, teases a predicted but not yet evidenced theory for how gravitational-wave emitting sources might form.” “While this event is the first of its kind to be discovered, it’s possible there are more out there that are hidden by the large amounts of dust close to their galaxies,” said Fong, who is also a member of the Center for Interdisciplinary Exploration and Research in Astrophysics at Northwestern. “Indeed, if this long-duration event came from merging compact objects, it contributes to the growing population of GRBs that defies our traditional classifications.” You learn something new every day. Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

SAN ANTONIO--(BUSINESS WIRE)--Jun 26, 2023--

MILPITAS, Calif.--(BUSINESS WIRE)--Jun 26, 2023--

China’s Guangzhou Automobile Group Co. said it has developed the world’s first car engine that runs on ammonia,

Canada’s explosive wildfire season has already pumped millions of tons of carbon dioxide into the atmosphere. Some of

The European Union is under pressure to revive plans to add a social pillar to its ESG-rulebook, after

President Joe Biden will announce how much money each state is set to receive from the largest-ever federal investment in broadband expansion

BEIJING Chinese e-commerce giant JD.com plans to open retail grocery stores through the merger of its 7Fresh supermarket

Companies including PepsiCo Inc. and Nike Inc. are calling for the European Union to implement stricter emissions targets

Apple has issued an urgent update for millions of iPhone users after two critical security flaws were discovered. The tech giant warned that the latest version of iOS 16, called iOS 16.5.1, was required in order to protect against two vulnerabilities that hackers already know how to exploit. One of the bugs involves a “malicious attachment” sent through iMessage, that allows cyber criminals to gain access to an iPhone’s audio recordings, photos and location data. Security researchers said the security flaw, dubbed TriangleDB, has already been exploited through a campaign called Operation Triangulation, which targeted employees of the cyber firm Kaspersky. “The deployment of the spyware is completely hidden and requires no action from the user,” Kaspersky wrote in a blog post earlier this month. “The spyware then quietly transmits private user information to remote servers: microphone recordings, photos from instant messengers, geolocation, and data about a number of other activities of the owner of the infected device.” The second bug affected Apple’s browser engine WebKit, which leaves users exposed to something known as arbitrary code execution. This could result in malicious third parties stealing data or hacking a device. Both exploits could also impact iPad and Mac users, with Apple issuing security fixes for all of these devices. Apple also released a software update for Apple Watch, which brings new features to its smartwatch. The Cupertino company unveiled its latest mobile operating system iOS 17 earlier this month, though it is not yet widely available. A full public release date of iOS 17 will take place when the new iPhone is announced in September. The iOS 16 update covers more than a decade’s worth of devices, going back to the iPhone 6s and Apple Watch Series 3. “This update provides important security fixes and is recommended for all users,” Apple wrote in the release notes for iOS 16.5.1. Apple Watch, iPhone, iPad and Mac users can update their devices by going to the Settings app and selecting ‘General’ > ‘Software update’, and then following the instructions. Read More Apple seeks trademark of ‘actual apple’, Swiss fruit association says Apple Watch 7 pre-order: How to buy the new smartwatch in the UK Apple introduces new version of Watch with complete redesign iPhone 13 - live: UK contract deals and prices for Apple, EE and O2

All eyes are on the Supreme Court for its final week, as the justices will release cases on issues such as affirmative action, student loan payments, election law and LGBTQ rights.

President Joe Biden will announce how much money each state is set to receive from the largest-ever federal investment in broadband expansion