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• 25/04/2025 - 10:52 Гость Lunar clockwork What scientists know for certain is that they need to get precision timekeeping instruments to the moon. a href=https://kra31s.cc kraken зеркало /a Exactly who pays for lunar clocks, which type of clocks will go, and where they’ll be positioned are all questions that remain up in the air, Gramling said. “We have to work all of this out,” she said. “I don’t think we know yet. I think it will be an amalgamation of several different things.” https://kra31s.cc kra cc Atomic clocks, Gramling noted, are great for long-term stability, and crystal oscillators have an advantage for short-term stability. “You never trust one clock,” Gramling added. “And you never trust two clocks.” Clocks of various types could be placed inside satellites that orbit the moon or perhaps at the precise locations on the lunar surface that astronauts will one day visit. As for price, an atomic clock worthy of space travel could cost around a few million dollars, according Gramling, with crystal oscillators coming in substantially cheaper. But, Patla said, you get what you pay for. “The very cheap oscillators may be off by milliseconds or even 10s of milliseconds,” he added. “And that is important because for navigation purposes — we need to have the clocks synchronized to 10s of nanoseconds.” A network of clocks on the moon could work in concert to inform the new lunar time scale, just as atomic clocks do for UTC on Earth. (There will not, Gramling added, be different time zones on the moon. “There have been conversations about creating different zones, with the answer: ‘No,’” she said. “But that could change in the future.”)
• 25/04/2025 - 05:18 Гость Lunar clockwork What scientists know for certain is that they need to get precision timekeeping instruments to the moon. a href=https://kra31s.cc kraken tor /a Exactly who pays for lunar clocks, which type of clocks will go, and where they’ll be positioned are all questions that remain up in the air, Gramling said. “We have to work all of this out,” she said. “I don’t think we know yet. I think it will be an amalgamation of several different things.” https://kra31s.cc kra30cc Atomic clocks, Gramling noted, are great for long-term stability, and crystal oscillators have an advantage for short-term stability. “You never trust one clock,” Gramling added. “And you never trust two clocks.” Clocks of various types could be placed inside satellites that orbit the moon or perhaps at the precise locations on the lunar surface that astronauts will one day visit. As for price, an atomic clock worthy of space travel could cost around a few million dollars, according Gramling, with crystal oscillators coming in substantially cheaper. But, Patla said, you get what you pay for. “The very cheap oscillators may be off by milliseconds or even 10s of milliseconds,” he added. “And that is important because for navigation purposes — we need to have the clocks synchronized to 10s of nanoseconds.” A network of clocks on the moon could work in concert to inform the new lunar time scale, just as atomic clocks do for UTC on Earth. (There will not, Gramling added, be different time zones on the moon. “There have been conversations about creating different zones, with the answer: ‘No,’” she said. “But that could change in the future.”)
• 25/04/2025 - 00:28 Гость An astronaut’s awe-inspiring views from life in space a href=https://www.dp.ru/a/2024/11/07/sud-zapretil-piramide-best раз анальный секс /a Longtime NASA astronaut Don Pettit, who has ventured to space four times, returned to Earth on Saturday night from the International Space Station. Pettit, who turned 70 on Sunday, landed at 9:20 p.m. ET in a Soyuz spacecraft with Roscosmos cosmonauts Alexey Ovchinin and Ivan Vagner near Zhezkazgan, Kazakhstan, after a seven-month stay aboard the orbiting laboratory. The scientist invented the first object patented in space — called the Capillary Beverage, Space Cup or Zero-G cup, which makes it easier to drink beverages in the absence of gravity, and he is also a celebrated astrophotographer known for capturing unique views of the cosmos. “One of the things I like to do with my astrophotography is to have a composition and a perspective that’s different than an Earth-centric one, typically showing an Earth horizon with the atmosphere on edge, the limb, and then some kind of astronomy, astrophotography, in relationship to that,” Pettit said from the space station during an April 3 interview with astrophysicist Neil deGrasse Tyson. “Earth is amazingly beautiful when your feet are firmly planted on the ground, and it’s beautiful from space,” Pettit said. “And it’s hard to say what is more beautiful. I think it’s because space is a unique opportunity we seek to focus on the beauty of being in orbit. If we had people living their whole life in orbit, when they come down to Earth, they would probably think that was the most beautiful perspective they’d ever seen.” Pettit takes his photos from the cupola on the space station, a favorite of crew members due to its seven windows that overlook Earth. Here are some of his most unforgettable views of what it’s like to live in space that he captured over the past seven months.

 
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