Scientists have cooked up the "alien haze" of distant planets, in an effort to help with the search for alien life. The haze is a simulation of the hazy skies that appear on water-rich exoplanets, or worlds outside of our solar system. That haziness can get in the way of observations of those planets, making it difficult to understand what is happening there. Haze can also affect conditions on the planet themselves. If the atmosphere has hazes or other particles then it can drastically change the temperature, amount of light an other factors – some of which might be make or break for alien life there. Scientists hope the homemade haze will let them better understand the atmospheres of other planets, and model how the planets themselves form and grow. They could allow us to better understand how the have distorts our picture of those planets – distortions that could give us the wrong understanding of the makeup of their atmospheres. Getting that wrong could mean potentially missing habitable worlds, for instance. The observations are used to come up with the estimates about the temperature and atmospheric conditions that are then used to determine whether a planet might be able to host alien life. “The big picture is whether there is life outside the solar system, but trying to answer that kind of question requires really detailed modeling of all different types, specifically in planets with lots of water,” said co-author Sarah Hörst, from Johns Hopkins University. “This has been a huge challenge because we just don't have the lab work to do that, so we are trying to use these new lab techniques to get more out of the data that we’re taking in with all these big fancy telescopes.” The team cooked up the haze using a custom-designed chamber in Hörst’s lab. The haze they made is formed out solid particles, suspended in gas, which changes how light interacts with the gas itself. To test the hazes they made, scientists shot ultraviolet light through them, measuring how much they absorbed and reflected. They found that hate haze matched the chemical signatures of a well-studied exoplanet. Scientists hope to develop yet more hazes, with different gas mixtures, that will let them better understand different atmospheres. The work is described in a new paper, 'Optical properties of organic haze analogues in water-rich exoplanet atmospheres observable with JWST', published in the journal Nature Astronomy. Read More SpaceX rockets are punching holes in atmosphere, causing blood-red ‘auroras’ Chinese rocket that slammed onto Moon may have carried mysterious undisclosed payload Nasa’s ‘Message in a Bottle’ will send your name into space

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TOKYO--(BUSINESS WIRE)--Aug 16, 2023--

Amazon is adding the same kind of brain that powers ChatGPT into Alexa. The new technology is intended to allow the virtual assistant to be more powerful and able to speak with its owners in more natural conversations. The announcement were part of a wide array of new devices launched by Amazon this week. It also revealed new tablets and Echos, including those with screens, as well as plans to use generative artificial intelligence to create art to show on those screens. Every year, Amazon announces a number of Alexa devices, which have in the past included everything from soundbars to microwaves. This year, much of its focus was on artificial intelligence. While Alexa was one of the first virtual assistants of its kind to go mainstream, Amazon has lagged behind rivals such as Microsoft and Google in integrating new large language models into those systems. The sudden rise of such technology has sparked greater scrutiny of AI from regulators, given its explosion into general use and concerns over its potential impact on human life as well as industry, jobs and education. During a live event to unveil its latest range of Alexa-powered devices, Amazon looked to reaffirm its position as a market leader in AI by showing off an update to the assistant that will allow for more natural conversations with Alexa, rather than just the transactional request fulfilment it currently runs on. In a live demonstration of Alexa’s new large language model (LLM), Amazon devices boss Dave Limp showed how the new version of the assistant will be able to be more expressive in its responses - for example sounding happier when returning a positive sporting result for a user’s favoured team. Based within a new section of the service called “Let’s Chat”, Alexa will respond without the use of a wake word first, be able to pick up a conversation after a break and still understand the context, as well as understand inferences and more vague prompts in a way that Limp said is “like talking to a friend”. For example, the new Alexa will respond to the prompt “I’m cold” by turning on the heating in a connected home. Amazon has not confirmed a general release date for the new version of Alexa, instead focusing on an early preview programme in the US to try out the new capabilities among some users. Technology expert Ben Wood, chief analyst at CCS Insight, said it was “little surprise” to see Amazon discussing the power of its AI assistant in this way. “It undoubtedly knows that it needs to keep pace with rivals such as Google and Microsoft so articulating what it is doing in this area was essential for this event,” he said. “The upgraded way to talk to Alexa certainly makes it a more personal experience but success will depend on Amazon being able to get consumers to engage with the Echo devices in a very different way to the transactional and basic requests used today. “Some users may find it a little intimidating, but if successful it could make interactions a lot more conversational.” Elsewhere at its hardware event, Amazon unveiled a string of new hardware products, including several new Alexa-powered Echo smart speakers and smart home hubs, as well as new Fire tablets and updated Fire TV Stick devices. Read More Neuralink’s monkeys may have died due to brain implants contrary to Musk’s claims Facebook changes logo to ‘make F stand apart’ – but can you tell the difference? What is ‘Rumble’, where Russell Brand is posting videos? Neuralink’s monkeys may have died due to brain implants contrary to Musk’s claims Facebook changes logo to ‘make F stand apart’ – but can you tell the difference? What is ‘Rumble’, where Russell Brand is posting videos?