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

Chile declares state of catastrophe as wildfires rage in Ñuble and Biobío

Wildland firefighting crews are battling 19 forest fires across the country, 12 of them concentrated in the Ñuble and Biobío regions, located about 500 kilometers south of Santiago.

“In light of the severe fires currently underway, I have decided to declare a state of catastrophe in the regions of Ñuble and Biobío. All resources are now available,” the president announced in a post on X.

Authorities have not yet released an official report on possible casualties or damage to homes.

According to images broadcast by local television, the fires have reached populated areas, particularly in the municipalities of Penco and Lirquén, in the Biobío region, which together are home to nearly 60,000 people. Burned vehicles were also reported on several streets.

“The Penco area and the entire Lirquén sector are the most critical zones and where the largest number of evacuations have taken place. We estimate that around 20,000 people have been evacuated,” said Alicia Cebrián, director of the National Disaster Prevention and Response Service (Senapred), in an interview with Mega TV.

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In recent years, forest fires have had a severe impact on the country, especially in the central-southern regions.

On February 2, 2024, multiple wildfires broke out simultaneously around the city of Viña del Mar, located 110 kilometers northwest of Santiago. Those fires resulted in 138 deaths, according to updated figures from the public prosecutor’s office, and left approximately 16,000 people affected, based on official data.

International

Former South Korean President Yoon sentenced to five years in prison

Former South Korean president Yoon Suk-yeol was sentenced on Friday to five years in prison for obstruction of justice and other charges, concluding the first in a series of trials stemming from his failed attempt to impose martial law in December 2024.

The sentence is shorter than the 10-year prison term sought by prosecutors against the 65-year-old conservative former leader, whose move against Parliament triggered a major political crisis that ultimately led to his removal from office.

Yoon, a former prosecutor, is still facing seven additional trials. One of them, on charges of insurrection, could potentially result in the death penalty.

On Friday, the Seoul Central District Court ruled on one of the multiple secondary cases linked to the affair, which plunged the country into months of mass protests and political instability.

International

U.S. deportation flight returns venezuelans to Caracas after Maduro’s ouster

A new flight carrying 231 Venezuelans deported from the United States arrived on Friday at the airport serving Caracas, marking the first such arrival since the military operation that ousted and captured President Nicolás Maduro.

On January 3, U.S. forces bombed the Venezuelan capital during an incursion in which Maduro and his wife, Cilia Flores, were captured. Both are now facing narcotrafficking charges in New York.

This was the first U.S.-flagged aircraft transporting migrants to land in Venezuela since the military action ordered by President Donald Trump, who has stated that he is now in charge of the country.

The aircraft departed from Phoenix, Arizona, and landed at Maiquetía International Airport, which serves the Venezuelan capital, at around 10:30 a.m. local time (14:30 GMT), according to AFP reporters on the ground.

The deportees arrived in Venezuela under a repatriation program that remained in place even during the height of the crisis between the two countries, when Maduro was still in power. U.S. planes carrying undocumented Venezuelan migrants continued to arrive throughout last year, despite the military deployment ordered by Trump.