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Guestbook

Arthurdof

08 Apr 2025 - 09:25 pm

Space, time: The continual question
If time moves differently on the peaks of mountains than the shores of the ocean, you can imagine that things get even more bizarre the farther away from Earth you travel.
Кракен даркнет
To add more complication: Time also passes slower the faster a person or spacecraft is moving, according to Einstein’s theory of special relativity.

Astronauts on the International Space Station, for example, are lucky, said Dr. Bijunath Patla, a theoretical physicist with the US National Institute of Standards and Technology, in a phone interview. Though the space station orbits about 200 miles (322 kilometers) above Earth’s surface, it also travels at high speeds — looping the planet 16 times per day — so the effects of relativity somewhat cancel each other out, Patla said. For that reason, astronauts on the orbiting laboratory can easily use Earth time to stay on schedule.
https://kra30c.cc
kraken тор
For other missions — it’s not so simple.

Fortunately, scientists already have decades of experience contending with the complexities.

Spacecraft, for example, are equipped with their own clocks called oscillators, Gramling said.

“They maintain their own time,” Gramling said. “And most of our operations for spacecraft — even spacecraft that are all the way out at Pluto, or the Kuiper Belt, like New Horizons — (rely on) ground stations that are back on Earth. So everything they’re doing has to correlate with UTC.”
But those spacecraft also rely on their own kept time, Gramling said. Vehicles exploring deep into the solar system, for example, have to know — based on their own time scale — when they are approaching a planet in case the spacecraft needs to use that planetary body for navigational purposes, she added.

For 50 years, scientists have also been able to observe atomic clocks that are tucked aboard GPS satellites, which orbit Earth about 12,550 miles (20,200 kilometers) away — or about one-nineteenth the distance between our planet and the moon.

Studying those clocks has given scientists a great starting point to begin extrapolating further as they set out to establish a new time scale for the moon, Patla said.

“We can easily compare (GPS) clocks to clocks on the ground,” Patla said, adding that scientists have found a way to gently slow GPS clocks down, making them tick more in-line with Earth-bound clocks. “Obviously, it’s not as easy as it sounds, but it’s easier than making a mess.”

Octaviotog

08 Apr 2025 - 09:25 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.
kra30 cc
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.”
https://kra30c.cc
kraken зайти
“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.”

Donaldmix

08 Apr 2025 - 09:12 pm

Americans nearing retirement and recent retirees said they were anxious and frustrated following a second day of market turmoil that hit their 401(k)s after President Donald Trump’s escalation of tariffs.

kra28 at
As the impending tariffs shook the global economy Friday, people who were planning on their retirement accounts to carry them through their golden years said the economic chaos was hitting too close to home.

kraken25.at
Some said they are pausing big-ticket purchases and reconsidering home renovations, while others said they fear their quality of life will be adversely affected by all the turmoil.

“I’m just kind of stunned, and with so much money in the market, we just sort of have to hope we have enough time to recover,” said Paula, 68, a former occupational health professional in New Jersey who retired three years ago.

Paula, who spoke on the condition of anonymity because she feared retaliation for speaking out against Trump administration policies, said she was worried about what lies ahead.
https://kra-27at.cc
“What we’ve been doing is trying to enjoy the time that we have, but you want to be able to make it last,” Paula said Friday. “I have no confidence here.”

Trump fulfilled his campaign promise this week to unleash sweeping tariffs, including on the United States’ largest trading partners, in a move that has sparked fears of a global trade war. The decision sent the stock market spinning. On Friday afternoon, the broad-based S&P 500 closed down 6%, the tech-heavy Nasdaq dropped 5.8%, and the Dow Jones Industrial Average fell more than 2,200 points, or about 5.5%.

Lavillmelay

08 Apr 2025 - 09:01 pm

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Peterboaws

08 Apr 2025 - 08:48 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.
кракен даркнет
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.”
https://kra30c.cc
kraken даркнет
“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.”

Jeffreysmork

08 Apr 2025 - 08:46 pm

Lunar clockwork
What scientists know for certain is that they need to get precision timekeeping instruments to the moon.
kra30 cc
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://kra30c.cc
Площадка кракен
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.”)

Lavillmelay

08 Apr 2025 - 07:46 pm

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Lavillmelay

08 Apr 2025 - 06:44 pm

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Claytonced

08 Apr 2025 - 04:43 pm

Африканський фестиваль їжі став для мене справжнім відкриттям. Дегустації відкрили нові горизонти смаків, а кулінарні [url=https://africa.sff.in.ua/]секрети[/url], які я дізнався, тепер часто використовую вдома. Майстер-класи з приготування традиційних страв були надзвичайно цікавими. Організатори подбали про кожну деталь, створивши комфортні умови для гостей. Якщо вас цікавлять такі [url=https://africa.sff.in.ua/]заходи[/url], дізнайтеся більше на сайті.

Lavillmelay

08 Apr 2025 - 12:38 pm

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Si buscas hosting web, dominios web, correos empresariales o crear páginas web gratis, ingresa a PaginaMX Por otro lado, si buscas crear códigos qr online ingresa al Creador de Códigos QR más potente que existe Tweet Guestbook Arthurdof 08 Apr 2025 - 09:25 pm Space, time: The continual question If time moves differently on the peaks of mountains than the shores of the ocean, you can imagine that things get even more bizarre the farther away from Earth you travel. Кракен даркнет To add more complication: Time also passes slower the faster a person or spacecraft is moving, according to Einstein’s theory of special relativity. Astronauts on the International Space Station, for example, are lucky, said Dr. Bijunath Patla, a theoretical physicist with the US National Institute of Standards and Technology, in a phone interview. Though the space station orbits about 200 miles (322 kilometers) above Earth’s surface, it also travels at high speeds — looping the planet 16 times per day — so the effects of relativity somewhat cancel each other out, Patla said. For that reason, astronauts on the orbiting laboratory can easily use Earth time to stay on schedule. https://kra30c.cc kraken тор For other missions — it’s not so simple. Fortunately, scientists already have decades of experience contending with the complexities. Spacecraft, for example, are equipped with their own clocks called oscillators, Gramling said. “They maintain their own time,” Gramling said. “And most of our operations for spacecraft — even spacecraft that are all the way out at Pluto, or the Kuiper Belt, like New Horizons — (rely on) ground stations that are back on Earth. So everything they’re doing has to correlate with UTC.” But those spacecraft also rely on their own kept time, Gramling said. Vehicles exploring deep into the solar system, for example, have to know — based on their own time scale — when they are approaching a planet in case the spacecraft needs to use that planetary body for navigational purposes, she added. For 50 years, scientists have also been able to observe atomic clocks that are tucked aboard GPS satellites, which orbit Earth about 12,550 miles (20,200 kilometers) away — or about one-nineteenth the distance between our planet and the moon. Studying those clocks has given scientists a great starting point to begin extrapolating further as they set out to establish a new time scale for the moon, Patla said. “We can easily compare (GPS) clocks to clocks on the ground,” Patla said, adding that scientists have found a way to gently slow GPS clocks down, making them tick more in-line with Earth-bound clocks. “Obviously, it’s not as easy as it sounds, but it’s easier than making a mess.” Octaviotog 08 Apr 2025 - 09:25 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. kra30 cc 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.” https://kra30c.cc kraken зайти “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.” Donaldmix 08 Apr 2025 - 09:12 pm Americans nearing retirement and recent retirees said they were anxious and frustrated following a second day of market turmoil that hit their 401(k)s after President Donald Trump’s escalation of tariffs. kra28 at As the impending tariffs shook the global economy Friday, people who were planning on their retirement accounts to carry them through their golden years said the economic chaos was hitting too close to home. kraken25.at Some said they are pausing big-ticket purchases and reconsidering home renovations, while others said they fear their quality of life will be adversely affected by all the turmoil. “I’m just kind of stunned, and with so much money in the market, we just sort of have to hope we have enough time to recover,” said Paula, 68, a former occupational health professional in New Jersey who retired three years ago. Paula, who spoke on the condition of anonymity because she feared retaliation for speaking out against Trump administration policies, said she was worried about what lies ahead. https://kra-27at.cc “What we’ve been doing is trying to enjoy the time that we have, but you want to be able to make it last,” Paula said Friday. “I have no confidence here.” Trump fulfilled his campaign promise this week to unleash sweeping tariffs, including on the United States’ largest trading partners, in a move that has sparked fears of a global trade war. The decision sent the stock market spinning. On Friday afternoon, the broad-based S&P 500 closed down 6%, the tech-heavy Nasdaq dropped 5.8%, and the Dow Jones Industrial Average fell more than 2,200 points, or about 5.5%. Lavillmelay 08 Apr 2025 - 09:01 pm [url=https://chimmed.ru/products/iso-propyl-345-trifluorophenyl-sulfide--id=4414065]iso propyl 3, 4, 5 trifluorophenyl sulfide - купить онлайн в интернет-магазине химмед [/url] Tegs: [u]mission microrna hsa mir 3173 3p - купить онлайн в интернет-магазине химмед [/u] [i]mission microrna hsa mir 3173 5p - купить онлайн в интернет-магазине химмед [/i] [b]mission microrna hsa mir 3173 5p - купить онлайн в интернет-магазине химмед [/b] iso propyl 3, 4 methylenedioxy phenyl sulfide - купить онлайн в интернет-магазине химмед https://chimmed.ru/products/iso-propyl-34-methylenedioxyphenyl-sulfide--id=4602953 Peterboaws 08 Apr 2025 - 08:48 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. кракен даркнет 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.” https://kra30c.cc kraken даркнет “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.” Jeffreysmork 08 Apr 2025 - 08:46 pm Lunar clockwork What scientists know for certain is that they need to get precision timekeeping instruments to the moon. kra30 cc 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://kra30c.cc Площадка кракен 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.”) Lavillmelay 08 Apr 2025 - 07:46 pm [url=https://chimmed.ru/products/immunopure-fluorescein-conjugated-fab2-fragment-id=427056]immunopure fluorescein conjugated f ab 2 fragment - купить онлайн в интернет-магазине химмед [/url] Tegs: [u]methyl s 3, 4 dihydroxybutanoate - купить онлайн в интернет-магазине химмед [/u] [i]methyl s 3 n cbz amino n phenyl succinamate - купить онлайн в интернет-магазине химмед [/i] [b]methyl s 3 phenyl beta alaninate hydrochloride, 97% - купить онлайн в интернет-магазине химмед [/b] immunopure human igg, whole mo lecule peroxidase conjugated - купить онлайн в интернет-магазине химмед https://chimmed.ru/products/immunopure-human-igg-whole-mo-lecule-peroxidase-conjugated-id=426953 Lavillmelay 08 Apr 2025 - 06:44 pm [url=https://chimmed.ru/products/human-thumpd3-gene-orf-cdna-clone-expression-plasmid-n-flag-tag-id=1786774]human thumpd3 gene orf cdna clone expression plasmid, n flag tag - купить онлайн в интернет-магазине химмед [/url] Tegs: [u]j&w ultra 2 gc column, 25 m, 0.20 mm, 0.11 µm, 7 inch cage - купить онлайн в интернет-магазине химмед [/u] [i]j&w ultra 2 gc column, 25 m, 0.20 mm, 0.33 µm, 7 inch cage - купить онлайн в интернет-магазине химмед [/i] [b]j&w ultra 2 gc column, 25 m, 0.32 mm, 0.17 µm - купить онлайн в интернет-магазине химмед [/b] human thumpd3 gene orf cdna clone expression plasmid, n myc tag - купить онлайн в интернет-магазине химмед https://chimmed.ru/products/human-thumpd3-gene-orf-cdna-clone-expression-plasmid-n-myc-tag-id=1743610 Claytonced 08 Apr 2025 - 04:43 pm Африканський фестиваль їжі став для мене справжнім відкриттям. Дегустації відкрили нові горизонти смаків, а кулінарні [url=https://africa.sff.in.ua/]секрети[/url], які я дізнався, тепер часто використовую вдома. Майстер-класи з приготування традиційних страв були надзвичайно цікавими. Організатори подбали про кожну деталь, створивши комфортні умови для гостей. Якщо вас цікавлять такі [url=https://africa.sff.in.ua/]заходи[/url], дізнайтеся більше на сайті. Lavillmelay 08 Apr 2025 - 12:38 pm [url=https://chimmed.ru/products/human-stk38l-gene-orf-cdna-clone-expression-plasmid-c-flag-tag-id=1800261]human stk38l gene orf cdna clone expression plasmid, c flag tag - купить онлайн в интернет-магазине химмед [/url] Tegs: [u]indolin 6 ol - купить онлайн в интернет-магазине химмед [/u] [i]indoline 2, 3 dione - купить онлайн в интернет-магазине химмед [/i] [b]indoline 3 carboxylic acid - купить онлайн в интернет-магазине химмед [/b] human stk38l gene orf cdna clone expression plasmid, c gfpspark tag - купить онлайн в интернет-магазине химмед https://chimmed.ru/products/human-stk38l-gene-orf-cdna-clone-expression-plasmid-c-gfpspark-tag-id=1771485 Previous 85 86 87 88 89 90 91 92 93 94 95 Next Feel free to leave us a message on our guestbook: Your name Your email address (will not be shown in this guestbook) ¿De qué color es el pasto? 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