Astronomers have seen the “afterglow” of two huge planets crashing into each other for the first time. Scientists watched as the heat and dust that were left behind from the crash swirled in front of their star, allowing them to see the aftermath of the explosion. The incident happened when two ice giant planets collided with each other, around a star like our own Sun. A blaze of light and dust resulted, which could be seen from Earth. Those effects were first spotted by an amateur astronomer social media, who noticed unusual light coming from the star. It had brightened up in infrared – getting lighter at those wavelengths for three years – and then the optical light began fading. Scientists then watched the star in an attempt to understand what was happening. They monitored for further changes at the star, named ASASSN-21qj, to see how the star’s brightness changed. “To be honest, this observation was a complete surprise to me. When we originally shared the visible light curve of this star with other astronomers, we started watching it with a network of other telescopes,” said co- lead author Matthew Kenworthy from Leiden University. “An astronomer on social media pointed out that the star brightened up in the infrared over a thousand days before the optical fading. I knew then this was an unusual event.” Their research suggested that the glow was the heat from the collision, which could be picked up by Nasa’s Neowise mission. Then the optical light began to fade when the dust covered the star, over a period of three years. “Our calculations and computer models indicate the temperature and size of the glowing material, as well as the amount of time the glow has lasted, is consistent with the collision of two ice giant exoplanets,” said co-lead author Simon Lock from the University of Bristol. The dust is then expected to star smearing out. Astronomers hope to confirm their theories by watching as that happens, since it should be visible both from Earth and with Nasa’s James Webb Space Telescope – and they might see that dust begin its journey into something else. It will be fascinating to observe further developments. Ultimately, the mass of material around the remnant may condense to form a retinue of moons that will orbit around this new planet,” said Zoe Leinhardt, from the University of Bristol, who was a co-author on the study. The research is described in a paper, ‘A planetary collision afterglow and transit of the resultant debris cloud’, published in Nature today. Read More 1.2 mile-high ‘dust devil’ spotted on Mars by Nasa’s Perseverance rover Researchers capture first-ever afterglow of huge planetary collision Earth hit by a huge solar storm that would devastate civilisation, trees show

President Joe Biden addressed the United Nations Tuesday and urged the world to stand by Ukraine. At times, it felt like he was also imploring the countries to stick with the United Nations.

Earth narrowly avoided an asteroid that flew past last week – and scientists did not spot the object until it had made its visit. The object, named 2023 NT1, was spotted on 15 July by the Atlas observatory in South Africa. Astronomers there say it was up to 60 metres in size. But at that point it had already made the dangerous bit of its journey: two days earlier, it had swept past Earth, at just a quarter of a distance between us and the Moon. At 60,000 miles away, that is a long way from doing any damage, but relatively close for an asteroid. As such, the asteroid didn’t pose any danger to Earth. But it was an important reminder that truly dangerous asteroids could fly towards Earth – and that we might not spot them until they are too late. That is because many asteroids, including 2023 NT1, fly towards us from the Sun. The bright light of our star can make it difficult to see anything else, especially asteroids that are relatively small at the scale of space. The European Space Agency estimates there could be a million asteroids in the same size range of 30 to 100 metres near Earth. And 98.9 per cent of them are still undiscovered, the space agency says. It has said that shows that there needs to be an improvement in the capabilities of humanity to detect such asteroids. Some are already being worked on, such as ESA’s NEOMIR, which will orbit between the Sun and the Earth and is designed to work as an early warning system for asteroids that would otherwise avoid detection, but will not launch until 2030. The asteroid 2023 NT1, at 60 metres across, is among the largest to have come so close to Earth in recent times. At that size, it could have done significant damage: the Chelyabinsk meteoroid that injured 1,500 people and damaged buildings when it fell to Earth in 2013 was only 20 metres across, for instance. From its approach last week, scientists have been able to catalogue and predict the asteroid’s movements. That should make it possible to track and spot it next time it comes close to Earth. Read More Powerful solar flare to disrupt communications, Russians warn What to expect from India’s Chandrayaan-3 mission to Moon’s south pole India launches historic mission to Moon’s south pole

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The wife of newsreader Huw Edwards has said he is “suffering from serious mental health issues” and is receiving “in-patient hospital care” as she named him as the BBC presenter facing allegations over payments for sexually explicit images. After intense speculation as to the identity of the BBC presenter at the centre of the allegations, Vicky Flind said in a statement that she was speaking out on her husband’s behalf after “what have been five extremely difficult days for our family”. Following the name reveal, the BBC and The Sun have both faced criticism for the handling of the events of the last few days, with colleagues and high-profile media personalities speaking out in support of Edwards on Wednesday night. The Metropolitan Police said no criminal offence had been committed by the presenter, adding: “There is no further police action. Sign up for our free Indy100 weekly newsletter “As such, the Met has advised the BBC it can continue with its internal investigation.” The statement added: “We are aware of media reporting of further allegations against the same individual. “No specific details or information about these allegations have been passed to us and therefore there is no police action at this time.” Now that the speculation about who the previously unnamed presenter was you would hope that the public and social media especially would allow Edwards himself and his family to deal with what is sure to be a distressing situation privately. Sadly though we cannot say that this is the case. Much like the OceanGate submarine tragedy the internet has managed to find a dark sense of humour in another wise serious situation involving real people. Yet you've only got to spend a few moments on Twitter, which continues its downward trajectory under Elon Musk, to be confronted with jokes about Huw Edwards, which were even prevalent on the platform prior to him being named as the presenter in question. Given that Edwards is now receiving hospital care because of the serious mental fatigue the story has placed upon him you'd hope that some people could afford to show a slight bit of dignity and not make any jokes that may further impact his condition or the other people involved in this story. Also there are better things to make jokes about at this time so maybe rather than add to the stress instead take some time to read the many statements of support offered to Edwards from his colleagues and peers. It's very easy to engage with big topics like this on social media but at the end of the day numerous real people, some only by association, are involved in this and likely still processing what happend. Allow them to deal with this in peace and for the right course of action to be taken, instead of creating cheap puns just for a few likes. Additional reporting by PA. 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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