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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

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Lionel Messi has been introduced to Inter Miami’s fans during a special event hosted at the MLS club’s DRV Pink Stadium. During the ceremony, which was dubbed The Unveil and broadcast live, the 36-year-old Argentina superstar greeted Inter Miami owner David Beckham with a hug before receiving his pink No 10 jersey. Messi told the crowd: “I want to thank all the people of Miami for their welcome and love since I arrived in this city. “The truth is that I’m very excited and very happy to be here in Miami and to be with you. “I can’t wait to start training and competing. I’m here with the desire I’ve always had to compete, to want to win, and to help the club continue to grow.” The stadium was practically full, despite the event being delayed by poor weather. Beckham said during the broadcast that it made for a “typical Miami welcome for one of the greatest players to ever have played the game”. He added: “The fact that we have our fans in here, celebrating this moment… this is what we have created and we’re very proud of that.” Joining Messi onstage was former Barcelona midfielder Sergio Busquets, whose arrival at Inter Miami was officially announced earlier on Sunday. Busquets, 35, who had spent his entire playing career at the Nou Camp, left Barca at the end of the season and will be reunited with former team-mate Messi, whose own move to Miami was confirmed 24 hours earlier. Speaking during The Unveil event, Inter Miami’s primary owner Jorge Mas called Messi “the best player to ever don boots”. He said: “When David and I first met and we dreamt of what Inter Miami represents, it started off with the freedom to dream. “And we dreamed of not only bringing elite players and the best players but the best player to ever don boots — and his name is Lionel Andres Messi.” Messi revealed last month he had decided to join the Florida side as his contract with Paris St Germain came to an end. With the deal now officially done, Messi is in line to make his debut for his new employers on Friday against Mexico’s Cruz Azul in the Leagues Cup. Seven-time Ballon d’Or winner Messi arrives after a season in which he helped his country to World Cup glory in Qatar, as well as PSG to the Ligue 1 title, as in his first campaign with them in 2021-22. That adds to an already huge trophy haul on his CV that features four Champions League successes from his years with Barcelona, for whom he scored a staggering total of 672 goals. Joining Miami sees Messi – who has also netted more than 100 international goals – reunite with boss Gerardo Martino, who he previously worked under with Barca and Argentina. Martino was appointed in June after the club sacked Beckham’s ex-Manchester United team-mate Phil Neville. Read More Sergio Busquets joins former Barcelona team-mate Lionel Messi at Inter Miami Beckham brightens smile on Messi mural to welcome superstar signing to Miami Inter Miami appoint Lionel Messi’s former boss Gerardo Martino as head coach The sporting weekend in pictures Sergio Busquets joins former Barcelona team-mate Lionel Messi at Inter Miami Lionel Messi seals Inter Miami move as MLS welcomes ‘greatest player in world’

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