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Scientists find six planet system where stars orbit in rhythmic beat
Astronomers have found a planetary system with six different worlds that orbit in a strange rhythm. The set of planets move around their star in a rhythmic beat, scientists say, staying synchronised in a kind of dance. The findings could help shed more light on how planets form and evolve, the researchers say. The star is smaller, and slightly dimmer than the Sun, and the six “sub-Neptunes” - possibly smaller versions of Neptune in our solar system - move in a cyclic rhythm. According to the experts, this orbital waltz repeats itself so precisely it can be readily set to music. The star, HD110067, is 100 light-years away in the northern constellation of Coma Berenices, and had perplexed researchers for years. Now scientists, including those at the University of Warwick, have revealed the true architecture of this unusual system using Nasa and European Space Agency (Esa) spacecraft. The analysis was led by University of Chicago scientist Dr Rafael Luque, who said: “This discovery is going to become a benchmark system to study how sub-Neptunes, the most common type of planets outside of the solar system, form, evolve, what are they made of, and if they possess the right conditions to support the existence of liquid water in their surfaces.” The first indication of planets orbiting the strange star system came in 2020, when Nasa’s Transiting Exoplanet Survey Satellite (Tess) detected dips in the star’s brightness which suggested planets were passing in between the star and the spacecraft. A preliminary analysis revealed two possible planets - one with a year (the length of time it takes to complete one orbit around the star) of 5.64 days, and another with an unknown period at the time. Two years later, Tess observed the same star again, and analysis ruled out the original interpretation but presented two additional possible planets. Much was still unknown about the planetary system, until scientists across the world - including those at the University of Warwick - joined the investigation. They used data from Esa’s Characterising Exoplanet Satellite (Cheops), hoping to determine the orbital periods of these faraway planets. While multi-planet systems are common in the Milky Way, those in a tight gravitational formation known as “resonance” are observed by astronomers far less often. In this case, the planet closest to the star makes three orbits for every two of the next planet out - called a 3/2 resonance - a pattern that is repeated among the four closest planets. Among the outermost planets, a pattern of four orbits for every three of the next planet out (a 4/3 resonance) is repeated twice. Thomas Wilson, from the Department of Physics at the University of Warwick, said: “By establishing this pattern of planet orbits, we were able to predict other orbits of planets we hadn’t yet detected. “From this we lined up previously unexplained dips in starlight observed by Cheops and discovered three additional planets with longer orbits. This was only possible with the crucial Cheops data.” Researchers say the planets - two to three times the size of Earth - are likely to have been performing this same rhythmic dance since the system formed billions of years ago. Dr Luque said: “We think only about 1% of all systems stay in resonance, and even fewer show a chain of planets in such configuration.” Experts say orbitally resonant systems are extremely important to find because they tell astronomers about the formation and subsequent evolution of the planetary system. Planets around stars tend to form in resonance but can easily have their orbits thrown around. For example, a very massive planet, a close encounter with a passing star, or a giant impact event can all disrupt the careful balance. Therefore, multi-planet systems preserving their resonance are rare. HD110067 is the brightest known system with four or more planets. Since those planets are all sub-Neptune-sized with likely larger atmospheres, it makes them ideal candidates for studying using the James Webb Space Telescope (JWST) and the Esa’s future Ariel telescope. Mr Wilson added: “All of these planets have large atmospheres - similar to Uranus or Neptune - which makes them perfect for observation with JWST. “It would be fascinating to test if these planets are rocky like Earth or Venus but with larger atmospheres - solid surfaces potentially with water. “However, they are all much hotter than Earth - 170C to 530C - which would make it very difficult for life to exist.” Hannah Osborne, a PhD student at UCL’s Mullard Space Science Laboratory and a co-author of the study, said: “The system itself is a key discovery for exoplanet science: because all six planets are in a resonant chain we know that the architecture of the system can’t have changed much since its formation, so by studying HD110067 we get a rare window into the past to understand how these types of systems may have formed and evolved.” The findings are published in the Nature journal. Additional reporting by Press Association Read More Astronomers find unprecedented ‘disc’ around distant planet Astronomers discover new six-planet system Scientists have cooked ‘alien haze’ that could help find life Astronomers find unprecedented ‘disc’ around distant planet Astronomers discover new six-planet system Scientists have cooked ‘alien haze’ that could help find life
2023-11-30 00:15
What Time is Starfield Playable?
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2023-09-01 04:28
Sony Q1 profit slides 30%, in line with estimates
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2023-08-09 14:18
Influencer responds to criticism for demanding commuters wait for her when filming on tube
An influencer has been criticised for complaining about commuters getting in her way as she posed for photos in front of a tube on the London Underground. In the viral video from last year, TikToker Antonia Freya Lydia (@turnttoni) attempted to show off her black feather strapless dress in a clip but this proved to be challenging as people were walking along the platform. "Taking an aesthetic video in London Underground be like," she wrote in the on-screen text as people walked past and blocked her shot. She added in the caption: "Like can yoh wait just one sec,sir." @turnttoni like can yoh wait just one sec,sir? #fy #foryou #london #underground Since sharing the video, it went with 8.9m views where people took to the comment section and didn't hold back on their thoughts. One person said: "Some people actually use the station to get to places instead of taking insta photos crazy right?!?" "GIRL IT’S A TRAIN STATION—" another person wrote. A third person added: "You know people have to go to work and they're not going to stop their lives for you. Don't want people around, go someplace private." "If you were in a wide open space this would make sense but… in a TRAIN STATION?!" a fourth commented. Someone else replied: "Imagine doing this at Oxford Circus and expecting people to get out of your way." While a few defended the influencer too "Don’t think she knew it was gonna be that busy and she is probably joking lol," one person wrote. Someone else replied: "Idk about y’all but i understand her completely." But this wasn't the end of the matter... The debate was reignited when Twitter user @schizarella (not Antonia in the original video) weighed in with their thoughts after the clip was reposted on the platform on Sunday. "When you see someone recording just walk behind the camera or wait literally ten seconds, if you can't do this then you don't deserve to be part of a civilized society," they wrote in a post that has since become unavailable to view. It prompted many people to disagree and criticise the influencer for her actions - here are some of the comments. In a recent TikTok, Antonia aka the influencer in the original video responded to a critical comment saying they couldn't believe she was complaining about people getting in her shot, and called her content "lame." @turnttoni Replying to @sop excuse me, what do you mean? #fy #foryou #subway To which Antonia replied with a video filled with different snaps of herself all over the world and in different outfits where she seemed to be unbothered as she wrote: "wait.... lame?" Then, she wrote in the caption: "excuse me, what do you mean?" Sign up to 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.
2023-09-18 18:18
JPMorgan Chase is fined by SEC after mistakenly deleting 47 million emails
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