International
NASA spaceship deflected asteroid in test to save Earth
AFP / Issam Ahmed
NASA on Tuesday said it had succeeded in deflecting an asteroid in a historic test of humanity’s ability to stop an incoming cosmic object from devastating life on Earth.
The fridge-sized Double Asteroid Redirection Test (DART) impactor deliberately smashed into the moonlet asteroid Dimorphos on September 26, pushing it into a smaller, faster orbit around its big brother Didymos, said NASA chief Bill Nelson.
“DART shortened the 11 hour 55 minute orbit to 11 hours and 23 minutes,” he said. Speeding up Dimorphos’ orbital period by 32 minutes exceeded NASA’s own expectation of 10 minutes.
“We showed the world that NASA is serious as a defender of this planet,” added Nelson.
The asteroid pair loop together around our Sun every 2.1 years, and pose no threat to our planet.
But they are ideal for studying the “kinetic impact” method of planetary defense, in case an actual approaching object is ever detected.
DART’s success as a proof-of-concept has made a reality of science fiction — notably in films such as “Armageddon” and “Don’t Look Up.”
Astronomers rejoiced in stunning images of matter spreading out thousands of miles in the wake of the impact — pictures collected by Earth and space telescopes, as well as a mini satellite that had traveled to the zone with DART.
Pseudo-comet
Thanks to its temporary new tail, Dimorphos, which is 530-foot (160-meter) in diameter or roughly the size of a big Egyptian pyramid, has turned into a manmade comet.
But quantifying just how well the test worked required an analysis of light patterns from ground telescopes, which took a few weeks to become apparent.
The binary asteroid system, which was around 6.8 million miles (11 million kilometers) from Earth at impact, is visible only as a single dot from the ground.
Ahead of the test, NASA scientists said the results of the experiment would reveal whether the asteroid is a solid rock, or more like a “rubbish pile” of boulders bound by mutual gravity.
If an asteroid is more solid, the momentum imparted by a spaceship will be limited. But if it is “fluffy” and significant mass is pushed at high velocity in the opposite direction to impact, there will be an additional boost.
Never actually photographed before, Dimorphos appeared as a speck of light around an hour before impact.
Its egg-like shape and craggy, boulder-dotted surface finally came into clear view in the last few moments, as DART raced toward it at roughly 14,500 miles (23,500 kilometers) per hour.
Mass extinction
Very few of the billions of asteroids and comets in our solar system are considered potentially hazardous to our planet, and none are expected in the next hundred years or so.
But wait long enough, and it will happen.
The geological record shows, for example, that a six-mile wide asteroid struck Earth 66 million years ago, plunging the world into a long winter that led to the mass extinction of the dinosaurs along with 75 percent of all species.
An asteroid the size of Dimorphos, by contrast, would only cause a regional impact, such as devastating a city.
Kinetic impact with a spaceship is just one way to defend the planet, albeit the only method possible with current technology.
Should an approaching object be detected early, a spaceship could be sent to fly alongside it for long enough to divert its path via using the ship’s gravitational pull, creating a so-called gravity tractor.
Another option would be launching nuclear explosives to redirect or destroy an asteroid.
NASA believes the best way to deploy such weapons would be at a distance, to impart force without blowing the asteroid to smithereens, which could further imperil Earth.
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People sit at their workstations within the Mission Operations Center during the Double Asteroid Redirection Test (DART) Technology Media Workshop Telecon Briefing and tour at the Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, on September 12, 2022, ahead of the September 26th project test mission. - The goal of the DART mission, which launched in November 2021, is to hit an asteroid with a spacecraft to slightly alter its trajectory. (Photo by Jim WATSON / AFP)
International
Claudia Sheinbaum: Operation Against ‘El Mencho’ Was Based on Pending Arrest Warrants
Mexico’s President Claudia Sheinbaum on Wednesday rejected claims that the military operation that resulted in the death of Nemesio Oseguera Cervantes, known as “El Mencho,” leader of the Jalisco New Generation Cartel (CJNG), was carried out under pressure from the United States government.
Sheinbaum explained that the deployment of federal forces was aimed at executing outstanding arrest warrants against Oseguera Cervantes, who was considered one of the most wanted criminals in both Mexico and the United States.
“That was not the objective (to ease pressure from the United States). It is very important, and I want to repeat it. This individual had an arrest warrant, or several,” Sheinbaum said, referring to the operation conducted on February 22.
According to the president, the initial goal was to capture Oseguera Cervantes, but military forces responded after coming under attack during the intervention.
“The operation was to detain him. The problem is that they were attacked — the Secretariat of National Defense — and they responded at that moment,” she said.
The president insisted that the action was not carried out in response to external demands, although she acknowledged intelligence cooperation with the United States.
“It was not done in any way because of pressure from the United States, not at all. Of course, there was intelligence information from the United States that was used specifically,” she concluded.
International
Spain Denies Any Agreement to Cooperate with U.S. Military in Iran Operations
Spain’s Foreign Minister José Manuel Albares on Wednesday firmly denied that Madrid has agreed to cooperate with the U.S. military in operations against Iran, contradicting statements made minutes earlier by White House Press Secretary Karoline Leavitt.
“I categorically deny it,” Albares said in a radio interview cited by EFE. “The position of the Spanish government regarding the war in the Middle East, the bombings in Iran, and the use of our bases has not changed by a single comma.”
Earlier in the day, Leavitt told reporters that Spain had “agreed to cooperate with the United States military in recent hours,” following President Donald Trump’s threat to impose a trade embargo on Madrid. Trump had warned of economic measures after Spain reportedly refused to allow the Pentagon to use facilities at Spanish bases for operations related to Iran.
“I have no idea what that could be referring to or where it could be coming from,” Albares said, insisting that Spain’s position “has not changed at all” and therefore “remains absolutely unchanged.” He added that he had “no desire” and “almost no time” to speculate about the White House spokesperson’s remarks.
Albares reiterated Spain’s “No to war” stance, which he said had been clearly and forcefully expressed by Prime Minister Pedro Sánchez in an institutional address. According to the foreign minister, that position has been supported by “many European colleagues.”
International
White House Says Spain Agrees to Cooperate with U.S. Military After Trump Threatens Trade Embargo
White House Press Secretary Karoline Leavitt said Wednesday that Spain has agreed “in recent hours” to cooperate with the U.S. military, following President Donald Trump’s threat to impose a trade embargo on Madrid.
Trump had warned of potential commercial measures after Spain reportedly refused to allow the Pentagon to use facilities at Spanish military bases for operations related to Iran.
“With respect to Spain, I think you heard the president’s message yesterday loud and clear, and I understand that in recent hours they have agreed to cooperate with the United States military,” Leavitt said during a press briefing.
She added that the U.S. military is currently coordinating with its counterparts in Spain. However, the president expects broader support.
“The president expects that all of Europe, all of our European allies, of course, will cooperate in this important mission — not only for the United States, but also for Europe,” Leavitt said.
Her remarks came in response to questions about Spain’s position and its role as a U.S. ally amid rising tensions surrounding operations involving Iran.
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