International

NASA spaceship deflected asteroid in test to save Earth

Photo: Jim Watson / AFP

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.

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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.

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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.

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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.

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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

Ninth Victim Recovered After Deadliest U.S. Avalanche in Decades

Rescue teams in California on Saturday recovered the body of the ninth and final victim of a deadly avalanche in the Sierra Nevada mountains, according to the local sheriff’s office.

The avalanche struck a group of 11 skiers and four guides on Tuesday as they were returning from a three-day backcountry trip near Castle Peak, a 2,777-meter (9,111-foot) mountain and popular tourist destination on the U.S. West Coast.

Six people were rescued alive on Tuesday. Authorities said the incident marks the deadliest avalanche in the United States since 1981.

“All nine individuals who lost their lives in the February 17 Castle Peak avalanche have been safely recovered from the mountain,” the Nevada County Sheriff’s Office said in a statement.

“There are no words that can truly capture the magnitude of this loss, and our hearts grieve alongside the families affected by this catastrophic event,” Sheriff Shannan Moon said.

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Officials had warned on Thursday that search operations would likely continue through the weekend due to severe weather conditions in the area.

Survivors were able to call for help shortly after the avalanche occurred. However, near-zero visibility and the risk of additional snow slides prevented rescue teams from reaching them for several hours.

International

Trump Defies Supreme Court With New 10% Global Tariff

Defiant in the face of a judicial setback, Donald Trump on Friday imposed a new across-the-board 10% tariff after the Supreme Court of the United States ruled that he does not have the authority to levy customs duties under the guise of a national emergency.

The Republican president signed the order in the Oval Office and announced on social media that the measure would take effect “almost immediately.” According to a statement from the White House, the decree will formally enter into force on February 24 for a period of 150 days.

It remains unclear whether the new tariff will apply to countries that have already negotiated trade agreements establishing rates higher than 10%.

Earlier in the day, the conservative-majority court ruled that a 1977 law cited by Trump to abruptly impose tariffs on individual countries — disrupting global trade — “does not authorize the president to impose tariffs.”

Trump said he was “deeply disappointed” by the decision and accused some justices of being influenced by “foreign interests.”

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Although he has made variable tariffs a cornerstone of his foreign policy, Trump acknowledged that it is uncertain whether the government will have to refund revenue already collected. A study by the University of Pennsylvaniaestimated that the amount at stake could reach as much as $175 billion.

“That issue was not addressed by the Court,” Trump told reporters, warning that the legal battle could drag on for “years.”

Justice Brett Kavanaugh, who dissented from the Court’s 6–3 majority opinion, cautioned that the legal process could become a “mess.”

Trump denied any error or haste in using tariffs as a policy tool, arguing instead that the six justices who ruled against him were motivated by “political correctness.” Vice President JD Vance wrote on X that the Court had acted “outside the law.”

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International

U.S. Targets Members of Outgoing Boric Administration With Visa Revocations

The United States government announced on Friday the revocation of visas for three Chilean officials—whose identities were not initially disclosed—citing activities that allegedly “undermined regional security,” an accusation that Chile denies.

In a statement, the U.S. Department of State did not provide specific details about the individuals involved but criticized the outgoing administration of leftist President Gabriel Boric.

“The legacy of the Boric government will be further tarnished by actions that undermine regional security to the ultimate detriment of the Chilean people,” the statement read. It was signed by U.S. Secretary of State Marco Rubio.

Chile’s Minister of Transport, Juan Carlos Muñoz, later confirmed in a video message to the press that he is among those sanctioned.

“I was recently informed that my visa to enter the United States has been revoked by that country, which I deeply regret,” Muñoz said.

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The U.S. statement also noted that Washington hopes to “advance shared priorities, including those that strengthen security in our hemisphere, with the upcoming Kast government.”

The electoral victory of ultraconservative leader José Antonio Kast was welcomed in Washington, which has been building alliances with like-minded governments in the region to reinforce its diplomatic and economic agenda—particularly in response to China’s growing investment presence in Latin America.

“We remain committed to promoting accountability for Chilean individuals who deliberately work to destabilize our hemisphere,” the statement concluded.