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Robertlurgy

18 Apr 2025 - 04:10 pm

‘A whole different mindset’
Accurate clockwork is one matter. But how future astronauts living and working on the lunar surface will experience time is a different question entirely.
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On Earth, our sense of one day is governed by the fact that the planet completes one rotation every 24 hours, giving most locations a consistent cycle of daylight and darkened nights. On the moon, however, the equator receives roughly 14 days of sunlight followed by 14 days of darkness.

“It’s just a very, very different concept” on the moon, Betts said. “And (NASA is) talking about landing astronauts in the very interesting south polar region (of the moon), where you have permanently lit and permanently shadowed areas. So, that’s a whole other set of confusion.”
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“It’ll be challenging” for those astronauts, Betts added. “It’s so different than Earth, and it’s just a whole different mindset.”

That will be true no matter what time is displayed on the astronauts’ watches.

Still, precision timekeeping matters — not just for the sake of scientifically understanding the passage of time on the moon but also for setting up all the infrastructure necessary to carry out missions.

The beauty of creating a time scale from scratch, Gramling said, is that scientists can take everything they have learned about timekeeping on Earth and apply it to a new system on the moon.

And if scientists can get it right on the moon, she added, they can get it right later down the road if NASA fulfills its goal of sending astronauts deeper into the solar system.

“We are very much looking at executing this on the moon, learning what we can learn,” Gramling said, “so that we are prepared to do the same thing on Mars or other future bodies.”

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18 Apr 2025 - 04:09 pm

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Andrehon

18 Apr 2025 - 03:58 pm

Lunar clockwork
What scientists know for certain is that they need to get precision timekeeping instruments to the moon.
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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.”
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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.”)

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18 Apr 2025 - 03:26 pm

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18 Apr 2025 - 02:10 pm

Dokumenty kolekcjonerskie to niezwykle ciekawy obszar dla milosników historii i kultury materialnej. Obejmuje szeroki zakres artefaktów, takich jak stare paszporty, dowody osobiste, prawa jazdy, bilety czy legitymacje. Kolekcjonowanie takich dokumentów moze byc pasjonujacym hobby, pozwalajacym na zglebianie historii i obyczajów róznych epok. Jednakze, ze wzgledu na swój charakter, dokumenty te budza równiez pewne kontrowersje, szczególnie w kontekscie ich ewentualnego wykorzystania w sposób niezgodny z prawem.

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Kolekcjonowanie dokumentów ma swoje korzenie w XIX wieku, kiedy to zainteresowanie historia i archeologia zaczelo rosnac wsród zamozniejszych warstw spolecznych. Z czasem, obok starozytnych rekopisów i ksiazek, pojawilo sie równiez zainteresowanie dokumentami o bardziej wspólczesnym charakterze, takimi jak bilety z wydarzen kulturalnych, legitymacje czy inne przedmioty zwiazane z codziennym zyciem.

W XX wieku, zwlaszcza po I wojnie swiatowej, dokumenty takie jak paszporty czy dowody osobiste zaczely byc postrzegane jako cenne pamiatki rodzinne, a takze interesujace obiekty dla kolekcjonerów. Ich wartosc wynikala nie tylko z ich rzadkosci, ale takze z kontekstu historycznego, w jakim powstaly i byly uzywane.

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Wartosc dokumentów kolekcjonerskich zalezy od wielu czynników, takich jak ich stan, wiek, rzadkosc oraz historyczne znaczenie. Na przyklad, paszport z okresu miedzywojennego nalezacy do znanej postaci historycznej moze osiagnac na aukcjach wysoka cene. Z kolei bilety z waznych wydarzen sportowych czy koncertów moga byc poszukiwane przez kolekcjonerów z calego swiata.

Wartosc dokumentów czesto wzrasta, gdy sa one zwiazane z waznymi momentami w historii, takimi jak wojny, rewolucje, czy zmiany polityczne. Na przyklad, dokumenty z czasów PRL-u, takie jak legitymacje partyjne czy przepustki graniczne, moga byc szczególnie cenione przez kolekcjonerów zainteresowanych historia Polski.

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18 Apr 2025 - 01:49 pm

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18 Apr 2025 - 01:45 pm

The voice of ‘White Lotus’ star Walton Goggins is the lullaby we didn’t know we needed
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While his “White Lotus” character Rick has been the source of some stress this season, Walton Goggins is here to soothe us into a state of dreamy sleep to make up for it.

The actor has partnered with relaxation and meditation app Calm for one of their famed Sleep Stories, lending his smoky voice to a fable titled “The Yard Sale.”

Goggins announced the Sleep Story on his verified Instagram on Tuesday, writing, “A friend once said to me the first question you ask someone shouldn’t be, ‘How are you?’ but rather, ‘How did you sleep last night?’ I agree.”

The post included an excerpt from the story, in which Goggins is heard languidly instructing listeners to relax their bodies and get into bed. “You could even climb into a hammock,” he added. “I wouldn’t do that because I’ve never gracefully got in or out of one.”

In the caption, the actor also wrote that he “wanted to create a Sleep Story that feels dreamlike, helping people slow their minds down by wandering through a yard sale (which happens to be one of my favorite things to do), uncovering hidden treasures.”

“It’s the Walton Goggins version of counting sheep. I hope you enjoy,” he added.

Other celebrities who have read bedtime stories in the hopes of putting audiences to sleep include Dolly Parton and the late Jimmy Stewart, whose voice was featured in a Calm Christmas Sleep Story in 2023 thanks to generative AI technology.

Goggins currently stars on “The White Lotus,” where his character is often the most stressed out and tortured of the ensemble, at one point setting a slew of snakes free.