Earth has been hit by a blast from a dead star so energetic that scientists cannot explain it. The burst of gamma rays, originating in a dead star known as a pulsar, is the most high energy of its kind ever seen. It was equivalent about ten trillion times the energy of visible light, or 20 tera-electronvolts. Scientists are unable to explain exactly what kind of a scenario could lead a pulsar to emit such intense energy, and the researchers behind the breakthrough say that it “requires a rethinking of how these natural accelerators work”. Scientists hope that they can find yet more powerful energy blasts from pulsars, with a view to better understanding how they are formed. Pulsars are formed when a star dies, exploding in a supernova and leaving behind a tiny, dead star. They are just 20 kilometres across, and spin extremely fast with a powerful magnetic field. “These dead stars are almost entirely made up of neutrons and are incredibly dense: a teaspoon of their material has a mass of more than five billion tonnes, or about 900 times the mass of the Great Pyramid of Giza,” said Emma de Oña Wilhelmi, a scientist at the High Energy Stereoscopic System observatory in Namibia that detected the blast. As pulsars spin, they throw out beams of electromagnetic radiation, throwing it out like a cosmic lighthouse. That means that someone in one spot – like the Earth – will see the radiation pulses flash in a regular rhythm as they spin past. The radiation is thought to be the result of fast electrons that are produced and thrown out by the the pulsar’s magnetosphere, which is made up of plasma and electromagnetic fields that surround the star and spin with it. Scientists can search the radiation for different energy bands within the electromagnetic spectrum, helping them understand it. When scientists previously did that with the Vela pulsar examined in the new study, they found that it was the brightest everseen in the radio band, and the brightest persistent source in the giga-electronvolts. But the new research found that there is a part of the radiation with even more high energy components. “That is about 200 times more energetic than all radiation ever detected before from this object,” said co-author Christo Venter from the North-West University in South Africa. Scientists don’t know exactly how that could happen. 
“This result challenges our previous knowledge of pulsars and requires a rethinking of how these natural accelerators work,” says Arache Djannati-Atai from the Astroparticle & Cosmology (APC) laboratory in France, who led the research. “The traditional scheme according to which particles are accelerated along magnetic field lines within or slightly outside the magnetosphere cannot sufficiently explain our observations. “Perhaps we are witnessing the acceleration of particles through the so-called magnetic reconnection process beyond the light cylinder, which still somehow preserves the rotational pattern? But even this scenario faces difficulties to explain how such extreme radiation is produced.” An article describing the findings, ‘Discovery of a Radiation Component from the Vela Pulsar Reaching 20 Teraelectronvolts’, is published today in the journal Nature Astronomy. Read More ‘Ring of fire’ solar eclipse this month will be last until 2046 Mystery behind massive star suddenly vanishing decoded New discovery is ‘holy grail’ breakthrough in search for aliens, scientist say ‘Ring of fire’ solar eclipse this month will be last until 2046 Mystery behind massive star suddenly vanishing decoded New discovery is ‘holy grail’ breakthrough in search for aliens, scientist say

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A woman discovered that her boyfriend was cheating on her with her best pal by using Google Street View. The unnamed lady randomly went on there after spotting one of the web giant’s cars passing her house. She says she was curious to know what route the vehicle took and decided to follow it online. The cars have taken snaps of every accessible road on the planet. They are used on Google Maps and Google Street View. At one point, the woman claims that she spotted her fella on a motorbike with another woman. She says: “The person on the back didn’t look like me so I followed them.” At certain points in the video, she apparently loses sight of her boyfriend’s motorcycle and had to search for him. She then recognises a side street he used to take her down. The woman explains: “He went down a street where he used to take me. “We always visited that little square. “At that point, I thought I was just being paranoid in my head, that it couldn't be him.” At the end of the video, a man is seen resting his head on a woman’s lap on a street bench. She claims the woman was her best friend. She says: “But it was my fella and my best friend. I'm devastated.” The video was shared on TikTok by Juliana Lima from Ceará, Brazil, where it went viral with 9.3 million views. One viewer commented: “Google saving lives.” Another joked: “I'm starting to think she was driving the Google car.” Someone else said: “It’s very unlucky for a guy to get caught by a Google car that passes once a year.” Maria wrote: “FBI no, Google Maps.” Paloma remarked: “My children's father didn't pay child support and he disappeared, so I found out where he was on Google Maps and I went there.” Someone else commented: “That Google Maps vehicle did not follow them. There's something wrong here. It gives street positions, but not with that precision.” Sign up for our free Indy100 weekly newsletter 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.

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As if changing Twitter's name to X wasn't enough, Elon Musk is now raising eyebrows with his plans to make the app dark mode-only. "It is better in every way,” the Tesla and SpaceX chief tweeted, confirming it would be bidding farewell to the iconic blue and white theme. Linda Yaccarino, who recently became CEO, has expressed that the app will move away from its short-form nature, and become a 'global marketplace for ideas, goods, services, and opportunities'. However, users are already in mourning before the transition has begun. Sign up to our new free Indy100 weekly newsletter

CITY OF INDUSTRY, Calif.--(BUSINESS WIRE)--May 17, 2023--

SpaceX's second private flight just made history by sending Saudi Arabia's first female astronaut towards the International Space Station. The SpaceX Falcon rocket launched from NASA's Kennedy Space Centre on Sunday night, and the astronaut and the other three passengers are expected to reach the space station in their capsule on Monday, where they will hang out for just over a week. Saudi Arabia's first astronauts in decades are stem cell researcher Rayyanah Barnawi, and Royal Saudi Air Force fighter pilot Ali al Qarni. "This is a dream come true for everyone," Barnawi said before the flight. Sign up to our free Indy100 weekly newsletter "Just being able to understand that this is possible - if me and Ali can do it, then they can do it, too." The journey was organised by Houston-based Axiom Space and the crew was led by Peggy Whitson, a former NASA astronaut who holds the US record for the most accumulated time in space - 665 days and counting. The company would not reveal how much the latest tickets cost, but previously cited per-seat prices of $55m (£44m). 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.