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¿De dónde venía el cometa 3I/ATLAS? Estudios revelan que se formó en un sistema muy distinto al nuestro

Kraig Pakulski 0 18 Article rating: No rating

Por Ashley Strickland, CNN

Astrónomos que utilizan observaciones con radiotelescopios para analizar en detalle un cometa interestelar han obtenido nuevos indicios sobre cuándo y dónde se formó este objeto celeste.

El cometa, llamado 3I/ATLAS, captó la atención mundial cuando los investigadores lo detectaron por primera vez atravesando nuestro sistema solar en julio. Es apenas el tercer objeto interestelar —es decir, un cuerpo celeste originado fuera de nuestro sistema solar— observado al pasar por nuestra región del universo. El cometa inició su salida del sistema solar en diciembre.

Una investigación inicial sobre su composición, publicada el 23 de abril en la revista Nature Astronomy, indica que se originó en un entorno muy diferente al de nuestro sistema solar, según los autores del estudio.

Las observaciones se realizaron con el Atacama Large Millimeter/submillimeter Array (ALMA, por sus siglas en inglés), en Chile, a comienzos de noviembre, pocos días después de que el cometa alcanzara su punto más cercano al Sol.

El radiotelescopio ALMA permitió a los investigadores medir deuterio en el cometa, lo que marca la primera vez que este isótopo de hidrógeno se detecta en un objeto interestelar.

“El deuterio se encuentra generalmente en el agua de los cometas del sistema solar y en los océanos de la Tierra en forma de agua deuterada, HDO, también conocida como agua semipesada”, explicó por correo electrónico el autor principal del estudio, Luis Eduardo Salazar Manzano, doctorando en el Departamento de Astronomía de la Universidad de Michigan.

“Nuestras observaciones con ALMA indican que la abundancia de deuterio en el agua de 3I/ATLAS es más de 40 veces superior a la de los océanos de la Tierra y más de 30 veces superior a la de los cometas del sistema solar”.

Los hallazgos podrían permitir a los científicos comprender mejor las condiciones extremas del sistema planetario del que proviene el cometa e incluso deducir cómo era la Vía Láctea mucho antes de la aparición de nuestro sistema solar.

“Los objetos interestelares son cápsulas del tiempo que traen material de los entornos donde se formaron otros sistemas planetarios, y nuestras mediciones finalmente nos permiten abrir esas cápsulas y observar las condiciones físicas en las que se originaron”, dijo Salazar Manzano.

El agua, o H₂O, suele contener dos átomos de hidrógeno y uno de oxígeno. Los átomos de hidrógeno incluyen un solo protón, una partícula subatómica con carga positiva. El agua deuterada es ligeramente diferente, ya que los átomos de hidrógeno también contienen un neutrón, una partícula sin carga. Esta adición hace que el agua deuterada sea más pesada que el H₂O.

Estudiar la abundancia de agua deuterada en 3I/ATLAS puede revelar señales sobre el lugar donde se formó el cometa, señalaron los investigadores.

“El enriquecimiento en deuterio suele producirse cuando el agua se forma en nubes moleculares frías del espacio interestelar, generalmente en la misma época en que se forman los sistemas solares alrededor de otras estrellas”, explicó Salazar Manzano.

Los investigadores creen que el sistema planetario donde se originó el cometa era extremadamente frío, mucho más que nuestro sistema solar durante su formación.

“La temperatura en el entorno de formación de 3I/ATLAS era inferior a 30 Kelvin, lo que corresponde a -243,14 grados Celsius”, señaló.

Investigaciones previas sugieren que el cometa podría tener hasta 11.000 millones de años, mucho más antiguo que nuestro siste

Spirit to halt all flights as of early Saturday

Kraig Pakulski 0 18 Article rating: No rating

By Chris Isidore, CNN

(CNN) — Spirit Airlines is set to announce in the coming hours that it will halt flying as of 3 am ET Saturday, according to two sources familiar with its plans, making it the first significant US airline to halt operations in nearly 25 years.

The shutdown comes as soaring jet fuel prices derailed its plans to emerge from its second bankruptcy. Efforts to reach a deal with the Trump administration on an 11th-hour rescue package that was also acceptable to a key group of creditors proved unsuccessful Friday.

The decision will leave millions of passengers holding Spirit tickets in coming months scrambling to make other travel arrangements and put 17,000 Spirit employees out of a job. Eliminating the airline’s flights is also likely to raise fares across the entire US airline industry.

As of just before midnight ET Friday, the airline still did not have a statement confirming the shutdown plans.

An attorney for Spirit told a bankruptcy court last week that the airline was in “very advanced discussions” with the administration on a rescue package.

But a key group of creditors did not agree to the that plan, according to a source familar with negotiations. Those creditors balked at the package that reportedly would have given the government control of the overwhelming majority the airline’s shares.

Earlier in the day Friday President Donald Trump seemed to back away from his earlier support of a rescue package for the airline, or possibly even a government purchase.

“Well, we’re looking at it — but if we can’t make a good deal, no institution’s been able to do it,” Trump said on Friday. “I’d like to save the jobs, but we’ll have an announcement sometime today. We gave them, we gave them a final proposal.”

Rising fuel costs the final blow

All air carriers have been struggling with higher jet fuel costs, which have nearly doubled since the start of the war in Iran. Jet fuel is the second greatest cost for airlines, behind only labor.

To help compensate, airlines have been raising fares and increasing fees, such as for checked bags. But fierce competition for travelers has kept them from passing along all of the costs to customers. And discount carriers like Spirit have a harder time raising fares due to their dependence on bargain-hunting customers.

Spirit has about 9,000 flights scheduled from May 2 through the end of the month, according to aviation analytics firm Cirium. Those flights have a total of 1.8 million seats. So that’s an average of about 300 flights and 60,000 potential passengers a day affected in just the next month.

What happens to passengers?

Passengers with tickets for upcoming Spirit flights should be able to get their money back by filing a claim with the issuer of the credit or debit card used to purchase the tickets. Those who paid cash, however, have now become Spirit’s creditors. That means they’ll have to wait to be reimbursed with everyone the company owes money.

As of 1 am ET Saturday there was still no word from the airline about its decision to shut down. Its site was still allowing passengers to search for flights to book. But its employees were getting word of the loss of their jobs. The leadership of the Association of Flight Attendants at Spirit sent a message out to the union’s 5,000 members at the airline about 1 am stating, “We are delivering the hardest news of our lives that Spirit will permanently cease operations at 3:00 AM Eastern Time on May 2.”

For those passengers in the middle of a trip, they must now find a seat on another airline. Last-minute “walk-up” fares are the most expensive in the industry.

While Trump last week

What a deserted mall in Moscow says about Russia’s economic woes

Kraig Pakulski 0 28 Article rating: No rating

By Zahra Ullah and Ana Archen, CNN

Moscow (CNN) — High-energy pop music blares out across the atrium of a glitzy shopping mall in a middle-class Moscow suburb. But what was meant as the soundtrack to the hustle and bustle of shoppers is instead playing to largely vacant and boarded-up glass-fronted units – a poignant sign of Russia’s economic malaise.

The sprawling Goodzone mall flung open its doors in 2014 amid much fanfare. It includes an eight-screen multiplex cinema that now sits deserted, its foyer lights switched off. Though still open seven days a week, the mall in southern Moscow appears to be slowly dying, with few open shops and even fewer customers.

Following its full-scale invasion of Ukraine, the exodus of Western companies and unprecedented Western sanctions, Russia’s economy defied expectations, pivoting to massive military spending and increased oil exports to China and India.

However, the economy is beginning to show signs of creeping strain, with GDP contracting 1.8% in the first two months of 2026. Russian President Vladimir Putin acknowledged the issue in a government meeting on economic affairs in mid-April.

“Statistics show that economic growth has, unfortunately, been slowing for two consecutive months,” Putin said, demanding officials explain “why the trajectory of macroeconomic indicators is currently falling short of expectations.”

The leader of Russia’s Communist Party, Gennady Zyuganov, later criticized what he described as a lack of competent responses to Putin’s questions at the government meeting, calling it “sad and disturbing.”

Speaking in Russia’s State Duma (parliament) last week, Zyuganov warned the country could face a Bolshevik-style revolution if the government fails to address the weakening economy.

While he stopped short of criticizing Putin, as is often the case with the choregraphed opposition permitted by the Kremlin, he did rebuke the government.

“We have repeatedly warned you: with such a course, the economy will inevitably fail,” Zyuganov said.

Deserted mall ‘semi-apocalyptic’

While there have been no signs of mass social unrest in Russia, and other malls including the giant Aviapark in northwest Moscow appear to be doing good business, several workers at Goodzone described to CNN with concern the increasingly minimal foot traffic there.

One of those was Ivan, a cashier at a branch of one of Russia’s largest retailers, who asked CNN not to use his surname or disclose his workplace. This is his second job, and he can’t afford to lose it in the current climate, he said.

“Well, in terms of the economic situation, does this tell you something about the situation in the country,” Ivan said, pointing to the screen of his cash register.

The monitor shows 13 transactions for the day so far – a paltry total of 3,417 rubles (about $45). It’s a Thursday afternoon in late April, and Ivan says the number of transactions in better times would be closer to 300.

“(Goodzone) looks semi-apocalyptic,” Ivan said. “The mall is so big, you could get lost and tired walking around it. It would seem it was built and designed for a huge flow of people, but I haven’t seen it.”

CNN has reached out to the mall’s administration office for comment. The website for the mall says parts of it are being refurbished, and that it is introducing new operators – neither of which CNN saw evidence of. The website is advertising retail spaces for rent at staggeringly low prices, from as little as 1 ruble (about $0.01) per square meter. Many of the empty

What oil crisis? China’s EVs are ready to dominate the 21st century

Kraig Pakulski 0 24 Article rating: No rating

By Simone McCarthy, CNN

Beijing (CNN) — A sleek SUV offers mechanical foot massages, a luxury minivan has rotating seats to help passengers hop into its third row – and a surprising proportion of models offer in-car karaoke with professional-grade speakers. Others have headlights that can project movies onto a wall to make anywhere a drive-in cinema. Here, intelligent driving features are ubiquitous, even in affordable models.

To many consumers peering in from the outside, the options in China – on display in Beijing this week at the world’s largest auto show – seem like a dream. But to some automakers and politicians around the world, they’re an existential threat.

Chinese carmakers are cranking out their offerings at a large scale and a comparatively low price. And there’s another major sell: while oil and gas costs skyrocket due to the Iran war, the vast majority of these cars are electric or hybrid.

The contrast with the US has never been as stark: Washington last year rolled back support for EVs in favor of gas guzzlers, and it has effectively barred Chinese cars from entering the market, citing a need to protect national security and local industry.

With US President Donald Trump expected in China in mid-May for talks with leader Xi Jinping, the country’s EV makers are also eyeing another frontier, watching whether growing global demand for EVs will help them pry open the door to the US market.

Regardless, the intended message from the 70-football-field-sized showcase is clear: China is relentlessly moving forward with the technology it believes will win the 21st century.

And China’s top carmakers – and Beijing – are betting big that the rest of the world will choose their vision of an electric future, rather than one still tied to the gas pump.

Rising gas prices are “a wake-up call for the people who never touch EV,” BYD executive Stella Li told CNN on the show’s sidelines, where she discussed the world’s largest EV maker’s ambitious expansion strategy. “When you jump to the electric car, you never walk back to switch to the gas vehicle.”

Outward push

Winning customers overseas is now imperative for China’s major players.

By a wide margin, the country has the world’s largest EV market. More than half of new cars sold in China are electric or hybrid. In its megacities and beyond, traffic is increasingly falling silent, the dull whir of the electric motor replacing the purr of an internal combustion engine.

But its industry titans are also locked in a knock-down, drag-out fight for market share, with brutal price wars and competition in a crowded home market deflating profits and stymieing growth.

Outward expansion is already ramping up as major brands push to build out charging infrastructure and woo customers and partners abroad. China’s EV exports in the first quarter surged 78% year on year, according to official data.

But China’s automakers are also navigating a global landscape that’s wary of the competition.

An open letter from more than 70 American lawmakers to Trump last week warned the president against “any effort to lower barriers for Chinese automobiles or otherwise facilitate their entry

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