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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As the cost of food rises and people continue returning to the office after lockdowns, finding an affordable lunch on the go is becoming more and more essential. Waitrose has just announced it is launching its first-ever lunchtime meal deal, with the premium supermarket offering a main, side and drink for £5. This is the most expensive meal deal among retailers at the time of writing. The return to the office following the lifting of lockdown restrictions has meant that millions of workers are reluctant to spend a fortune on lunches, but are still searching for an affordable and easy option nearby their office or workplace. But as food prices rise, the cost of the most reliable lunch staple, the meal deal, has increased across UK retailers. For example, Tesco had its meal deal priced at £3 for almost a decade, before increasing it to £3.90 for regular customers and £3.40 for Clubcard holders in October 2022. With that in mind, and since it’s important to have a lunch to look forward to, how much does a meal deal cost in 2023? Tesco Regular price: £3.90 Clubcard holders: £3.40 The supermarket also offers a £5 premium meal deal, offering a premium main, snack and drink. Sainsbury’s Standard price: £3.50 Greggs Standard price: £3.60 Boots Standard price: £3.99 (excluding London) Advantage Card price: £3.60 London price: £4.50 with an advantage card, £4.99 without Co-op Standard price: £4 Co-op membership card holders: £3.50 Morrisons Standard price: £4 Waitrose Standard price: £5 Read More Former royal chef explains why Prince William and Kate’s children don’t eat with them Prince Harry and Meghan Markle sightseeing tour led by Thomas Markle’s friend sparks outrage over privacy Bride tries on mother’s wedding dress 30 years after parents’ wedding Waitrose has launched its first ever lunchtime meal deal 30-minute summer recipes for all the family to enjoy What to cook this week: Tomato tart, sweetcorn pasta and other summery suppers