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

Death toll from southern Spain train crash rises to 40

The death toll from the train accident that occurred on Sunday in southern Spain has risen to 40, according to investigative sources cited by EFE on Monday afternoon.

Since early Monday, search operations have focused on the damaged carriages of a Renfe train bound for Huelva, which collided with the last derailed cars of an Iryo train traveling from Málaga to Madrid after it left the tracks.

The crash has also left more than 150 people injured. Of these, 41 remain hospitalized, including 12 in intensive care units at hospitals across the Andalusia region.

More than 220 Civil Guard officers are working at the site, searching the railway line and surrounding areas for key evidence to help identify victims and determine the causes of the accident.

The tragedy has revived memories of the deadliest railway disasters in Europe in recent decades. In Spain, the most severe occurred on July 24, 2013, when an Alvia train derailed near Santiago de Compostela, killing 80 people and injuring 130 others.

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At the European level, the worst rail disaster took place on June 3, 1998, in Eschede, northern Germany, when a high-speed train struck a bridge pillar at 200 kilometers per hour, resulting in 98 deaths and 120 injuries.

International

Spain’s Prime Minister pledges transparency after train crash kills at least 39

Spanish Prime Minister Pedro Sánchez pledged on Monday to ensure “absolute transparency” regarding the causes of a train crash that killed at least 39 people on Sunday in southern Spain, warning that the death toll could still rise.

The fatal accident occurred in the Andalusia region, where the number of confirmed deaths reached 39 by Monday morning, according to a spokesperson for the Ministry of the Interior.

Authorities were preparing to deploy heavy machinery to lift several derailed train cars. “We are waiting for cranes to be installed this morning to lift cars one, two and three of the Alvia train, which suffered the most damage,” said Andalusian regional president Juanma Moreno Bonilla on regional television. “It is likely that once they are lifted, we may find more victims,” he added.

The disaster also left more than 120 people injured. As of Monday afternoon, 43 victims remained hospitalized, including 12 in intensive care, according to emergency services.

International

Over 160 christian worshippers kidnapped in Kaduna Church attacks

More than 160 Christian worshippers were abducted on Sunday during coordinated attacks carried out by armed gangs on two churches in a remote village in Kaduna State, northern Nigeria, according to a cleric and a United Nations report accessed by AFP on Monday.

Nigeria, Africa’s most populous nation, has witnessed a renewed surge in mass kidnappings since November, prompting the United States government to carry out military strikes on Christmas Day in the northwestern state of Sokoto.

U.S. President Donald Trump accused Nigerian armed groups of targeting Christians, describing the violence as a form of “genocide” against the religious community.

According to Reverend Joseph Hayab, president of the Christian Association of Nigeria in the north, the attackers arrived in large numbers, blocked access to the churches, and forced worshippers to flee into nearby forests.

“The attackers came in large numbers, sealed off the entrances to the churches, and drove the faithful into the bush,” Hayab told AFP.