Libro de Visitas

Jeffreysah

17 Apr 2025 - 04:21 pm

Lunar clockwork
What scientists know for certain is that they need to get precision timekeeping instruments to the moon.
kraken войти
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
kra31 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.”)

Virgilfaide

17 Apr 2025 - 04:17 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.
kraken 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
кракен даркнет
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.”

Donaldsusty

17 Apr 2025 - 04:09 pm

darknet markets onion dark web market

Pingjiste

17 Apr 2025 - 03:25 pm

darknet drug market dark web link

Dondonhaunk

17 Apr 2025 - 03:16 pm

bitcoin dark web dark web market links

Rabycrold

17 Apr 2025 - 02:39 pm

dark web market links darknet site

Donaldsusty

17 Apr 2025 - 01:42 pm

darknet market list darknet markets 2025

Pingjiste

17 Apr 2025 - 01:26 pm

dark market list dark market onion

Davidlew

17 Apr 2025 - 01:13 pm

By Henry Austin
A Russian-American woman who was imprisoned for treason by Russia has been freed, Secretary of State Marco Rubio said Thursday.
mega2olipdgn3zpmm6fjcl2jfeweyy7gjuzrs3mja7nkchflkdu7lfyd.onion
Former ballerina Ksenia Karelina was born in Russia but had built a new life as an aesthetician at a Los Angeles spa after immigrating to the United States over a decade ago. She “is on a plane back home to the United States,” having been “wrongfully detained by Russia for over a year,” Rubio said on in a post on X. He credited President Donald Trump with securing her release.
mega2ooyov5nrf42ld7gnbsurg2rgmxn2xkxj5datwzv3qy5pk3p57qd
Karolina’s lawyer, Mikhail Mushailov, confirmed her release in a statement on Instagram. “Two hours ago she was in touch with her relatives and took off from Abu Dhabi to the U.S.,” he wrote, adding that he had known about her release since Tuesday.
mega2olipdgn3zpmm6fjcl2jfeweyy7gjuzrs3mja7nkchflkdu7lfyd
Russia’s Federal Security Service (FSB) detained Karelina in January 2024 while she was visiting her parents and young sister in the city Yekaterinburg. It did not provide further details or evidence of her alleged crime.
mega2ousbpnmmput4tiyu4oa4mjck2icier52ud6lmgrhzlikrxmysid.onion
At the time, Russian legal group Perviy Otdel said it had information that Karelina had donated just over $51.80 from her U.S. bank account on Feb. 24, 2022 — the day that Russia launched its full-scale invasion of Ukraine — to a charity that sends aid to Ukraine. A spa where she had previously worked confirmed this in a statement on Facebook.

Although Russia’s FSB did not confirm that figure, it said Karelina’s donation “was subsequently used to purchase tactical medical supplies, equipment, weapons, and ammunition for the Ukrainian armed forces.”

She was sentenced in August to 12 years in a penal colony for “high treason,” having “fully admitted her guilt” at a closed trial in the southwestern Russian city of Yekaterinberg, Sverdlovsky Region Court said in a news release at the time.

The sentence came against the backdrop of Russia’s 3-year-long war with Ukraine during which President Vladimir Putin’s government has cracked down on dissent. Any perceived criticism of the military is banned.

Recommended
mega2onq5nskz5ib5cg3a2aqkcprqnm3lojxtik2zeou6au6mno7d4ad.onion

https://mega2ousbpnmmput4tiyu4oa4mjck2icier52ud6lmgrhzlikrxmysid.com

Johnnydrego

17 Apr 2025 - 01:01 pm

Want to explore ganja. Where do I start?

Uncover useful links for cannabis enthusiasts: semi marijuana