List of All Articles with Tag 'h'

By Dietrich Knauth NEW YORK Crypto lender Celsius Network may have to seek a new creditor vote on

The Hubble Space Telescope has gone into “safe mode” for the third time in a week. The ageing, floating observatory – which was launched in 1990, with an expected lifespan of 15 years, and was last serviced by the space shuttle in 2009 – occasionally needs to be fixed from the ground when it runs into issues. This time, Nasa said it had entered safe mode because of an “ongoing gyroscope issue”. The space agency is “working to resume science operations”, it said. The current problems had begun 23 November, it said, and it is still not online. The telescope had been hit with the same issue twice in the days before, when it was also sent into safe mode – but came back online. Nasa said Hubble was otherwise in good health, and that its instruments were stable. It is able to operate with just one working gyroscope, but is less efficient when it does. When the spacecraft was serviced on the fifth and final visit from the space shuttle, in 2009, astronauts installed six new gyroscopes on Hubble. Three of those are still in operation, including the one currently having issues. The gyroscopes are used to aim the telescope around space. They measure Hubble’s turning and help it work out where it is pointing, so that it can be moved around in space. Nasa says that it believes Hubble will continue working, alongside other telescopes such as Webb, “throughout this decade and possibly into the next”. When it is no longer operational, Hubble will re-enter Earth’s atmosphere, though that is not expected to happen until the mid to late 2030s at the earliest. It is expected to have a propulsion system attached to it which will either push it down for a controlled fall into the Pacific Ocean or carry it further up into a higher orbit. Read More Nasa has received a signal from 10 million miles away SpaceX hints next Starship launch attempt could be soon Elon Musk believes OpenAI may have made ‘dangerous’ discovery

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By Jarrett Renshaw President Joe Biden's name will not be on New Hampshire's primary ballot, but top Democrats

If the Chicago Bears were to move off Matt Eberflus by the end of the season, they already have their ideal replacement in mind. That would be former Bears quarterback Jim Harbaugh, who is leading his alma mater of Michigan to unprecedented heights.

Angola rejected a new output quota handed to it by OPEC and said it planned to breach it,

A consortium dubbed “Friends of Golf” featuring billionaires Henry Kravis and George Roberts has dropped its pursuit of

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A New York appeals court reinstated a series of gag orders barring Donald Trump and his lawyers from

A meteorite which smashed into earth 29m years ago may be behind a strange yellow glass found in a certain part of the desert in southeast Libya and southwestern Egypt, according to researchers. The Great Sand Sea Desert stretches over about 72,000 square kilometres across the two countries, and is the only place where the mysterious yellow material is found on Earth. Researchers first described it in a 1933 scientific paper, calling it Libyan desert glass. Mineral collectors have long valued it for its beauty and mysterious qualities – and it was even found in a pendant in Egyptian pharaoh Tutankhamun’s tomb. The origin of the glass has been a mystery for centuries, but researchers writing in the journal De Gruyter used new advanced microscopy technology to get answers. Elizaveta Kovaleva, a lecturer at the University of the Western Cape, wrote that the glass was caused by “the impact of a meteorite on the Earth's surface”. Writing in The Conversation, she said: “Space collisions are a primary process in the solar system, as planets and their natural satellites accreted via the asteroids and planet embryos (also called planetesimals) colliding with each other. These impacts helped our planet to assemble, too.” She said: “We studied the samples with a state-of-the-art transmission electron microscopy technique, which allows us to see tiny particles of material – 20,000 times smaller than the thickness of a paper sheet. “Using this super-high magnification technique, we found small minerals in this glass: different types of zirconium oxide (ZrO₂).” One of the types of this mineral found in the glass can only form at temperatures between 2,250 celsius and 2,700 celsius. Toasty. Kovaleva said: “Such conditions can only be obtained in the Earth's crust by a meteorite impact or the explosion of an atomic bomb.” However, she wrote, there are just as many questions as there are answers. The nearest known meteorite craters are too far away and too small to be the cause of that much glass all concentrated in one part of the world. “So, while we've solved part of the mystery, more questions remain. Where is the parental crater? How big is it – and where is it? Could it have been eroded, deformed or covered by sand?” Safe to say, the scientists will keep on looking until they have the answers. How to join the indy100's free WhatsApp channel Sign up to our free indy100 weekly newsletter 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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