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There are eight planets in our solar system – plus poor old Pluto, which was demoted in 2006 – but what if there were more? Turns out that might be the case. Astronomers have calculated there is a 7 per cent chance that Earth has another neighbour hiding in the Oort cloud, a spherical region of ice chunks and rocks that is tens of thousands of times farther from the sun than we are. “It’s completely plausible for our solar system to have captured such an Oort cloud planet,” said Nathan Kaib, a co-author on the work and an astronomer at the Planetary Science Institute. Sign up to our free Indy100 weekly newsletter Hidden worlds like this are “a class of planets that should definitely exist but have received relatively little attention” until now, he said.. If a planet is hiding in the Oort cloud, it’s almost certainly an ice giant. Large planets like Jupiter and Saturn are generally born as twins. They have huge gravitational pulls of their own, however, and sometimes destabilise one another. That could have led to a planet to be nudged out of the solar system entirely – or exiled to its outer reaches, where the Oort cloud resides. “The survivor planets have eccentric orbits, which are like the scars from their violent pasts,” said lead author Sean Raymond, researcher at the University of Bordeaux’s Astrophysics Laboratory. That means that the Oort cloud planet could have a significantly elongated orbit, unlike the near-perfect circle Earth tracks around the sun. Trouble is, when things are that far away, they’re pretty difficult to spot. “It would be extremely hard to detect,” added Raymond. “If a Neptune-sized planet existed in our own Oort cloud, there’s a good chance that we wouldn’t have found it yet,” said Malena Rice, an astronomer at MIT not involved in this work. “Amazingly, it can sometimes be easier to spot planets hundreds of light-years away than those right in our own backyard.” Time to crack out the telescope. 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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From salon visits to shampoo, looking after your hair can be an expensive business. And unlike things like manicures or waxing – which you can do at home if you so wish – hair-cutting is best left to the pros. Yet there are ways to save money at the hairdressers and at home. Here, experts offer their advice for affordable hair care… 1. Low-maintenance cuts Some hairstyles require more regular trims than others. An Anna Wintour-style bob, for example, is the pinnacle of high-maintenance hair. “The best way to make your pennies stretch in between appointments is to opt for a low-maintenance haircut,” says Tyler Moore, expert stylist at Live True London. “These longer-lasting haircuts are usually ones that grow out gracefully and are on the longer side.” For long hair, he recommends a layered style: “Ask for some long, movement-creating layers to add some definition and shape to your cut. “These will grow out relatively well and will only need maintaining when you want to tidy your cut up.” Avoid blunt fringes that will need trimming a lot, but parted ‘curtain bangs’ won’t require as much upkeep. “If you prefer to keep things short, ask your hairdresser for a sleek, one-length chop,” says Moore. “If you don’t mind rocking several different lengths over a period of time, opt for a layer-free chop. The shorter you go, the more mileage you’ll get out of this.” 2. DIY dye For dark hair in particular, box dye is very affordable, especially compared to an appointment with a salon colourist. But what if you’ve never gone DIY before? “When in doubt, choose a shade that is on the lighter side – you can always go a shade darker the next time,” says Carin Freidag, global senior hair education manager at Clairol. To ensure rich all-over colour she advises: “Make sure you fully saturate your hair with the colourant mixture. If you have long or very thick hair, get two boxes so you have enough.” Start by doing an allergy patch test 48 hours before application following the instructions in the box. “Do the strand test at the same time since you will have some of the mixture left over,” Freidag says. “Simply apply the mixture to a small portion of hair and set the timer for 25 minutes. Wipe off with a wet paper towel, dry it and see how you like it.” If you’re happy, carry on: “Part and clip your hair into four sections so it’s easier to manage. If you are covering grey, start in the section where you have the most grey.” 3. Keep your blonde bright “If you’re blonde, keeping your colour looking salon fresh means booking a salon appointment for a toner, especially after the summer months,” says celebrity hair stylist and Olaplex expert Tom Smith. “However you can extend the life of your blonde colour with Olaplex No. 4P Blonde Enhancer Toning Shampoo which neutralises unwanted yellow tones, leaving your hair brass-free blonde for longer.” Kris Barnes, celebrity colourist and Provoke ambassador agrees that purple shampoo is a must for blondes. “The Provoke Touch of Silver range is brilliant for keeping hair vibrant and it’s such a steal,” he says. “My clients can maintain their colour affordably at home and come to me slightly less often than before.” Olaplex No.4P Blonde Enhancer Toning Shampoo, £28 Provoke Touch Of Silver Brightening Shampoo, £2.99, Boots 4. Long-lasting colour As with cuts, some types of hair colour require more maintenance than others, such as all-over shades. “I would say switch up the colour a bit and go for a more lived-in colour,” says Barnes. “A blonde balayage or some depth towards the root will mean you can go a bit longer between colour visits, whereas full highlights will mean roots show quickly and will need re-doing.” Moore adds: “Steer clear of bright fashion colours, cool-toned blondes, and coppers – these require a lot of upkeep.” 5. Cover your roots Root cover-up spray is a brilliant way to extend the time between your colour appointments, and there’s a huge range of shades to choose from. “Simply shake and spray right where you need it and voila, done!” says Freidag. “It’s removed with shampoo so gives you the flexibility to go to the gym or out on a rainy day without fear of it running.” Clairol Root Touch Up 2 In 1 Spray Light Brown, £8.99, Boots 6. Use dry shampoo Refreshing your hair more often with a cheap-as-chips dry shampoo saves money on liquid shampoo and conditioner, as well as your water and electricity bills. “The way to get the most out of your dry shampoo is to give the can a big shake to awaken the formula and then ensure you are spraying at least 30cm away from the roots,” says hair stylist and Batiste brand ambassador Samantha Cusick. “Don’t spray close to your head that’s how you’ll get powdery residue. Don’t forget to massage in and then brush out to be most effective.” Batiste Dry Shampoo Tropical, £3.59, Superdrug 7. Make your own mask “Create your own deep conditioning masks using ingredients found in your home, like olive oil, peppermint and honey,” says Oyinkansola Adebayo, founder of Niyo Hair and Beauty. Other foods recommended by beauty buffs include coconut oil, avocado, bananas and egg yolk. “These natural products nourish, enhance your curls and moisturise your hair without the hefty price tag of store-bought treatments which may have ingredients harmful for your hair.” Read More Charity boss speaks out over ‘traumatic’ encounter with royal aide Ukraine war’s heaviest fight rages in east - follow live Sarcoma Awareness Month: What you need to know about these cancers Bjork’s controversial swan dress to go on display in new exhibition Chrissy Teigen welcomes fourth child – how does surrogacy actually work?

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Saudi Arabia is pumping billions of dollars into the holy city of Mecca to meet its ambitious economic targets, with high-end hotels, apartment blocks, retailers and restaurants planned for areas around the Grand Mosque

By Jonathan Stempel and Jack Queen NEW YORK The U.S. government has urged an appeals court to uphold