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

Police investigate deaths of Rob Reiner and wife as apparent homicide

The Los Angeles Police Department (LAPD) is investigating the deaths of Hollywood actor and filmmaker Rob Reinerand his wife as an “apparent homicide,” amid a wave of tributes to the director of classics such as When Harry Met Sally.

According to U.S. media reports on Sunday, Rob Reiner and Michele Singer Reiner were found dead at their Los Angeles mansion with what appeared to be stab wounds.

Several political figures shared messages of condolence following the reported deaths of the director of A Few Good Menand his wife.

While the LAPD did not officially confirm the identities of the victims, it stated that homicide detectives were dispatched to the Reiner residence.

“At this time, no additional details are available and the investigation into an apparent homicide is ongoing,” the Los Angeles Police Department said in a statement posted on social media.

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LAPD Deputy Chief Alan Hamilton told reporters that no arrests have been made and that no individuals are currently being questioned as suspects.

“I’m not going to confirm whether anyone is being questioned at this moment or not. We are going to try to speak with as many family members as we can,” Hamilton said.

CNN reported that a family spokesperson confirmed the deaths of Reiner and his wife.

California Governor Gavin Newsom, former U.S. President Barack Obama, and former Vice President Kamala Harrisissued statements expressing their condolences.

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International

U.S. and Mexico Reach Deal to Address Water Deficit Under 1944 Treaty

The United States and Mexico have reached an agreement to comply with current water obligations affecting U.S. farmers and ranchers and for Mexico to cover its water deficit to Texas under the 1944 Water Treaty, the U.S. Department of Agriculture said in a statement.

The department уточified that the agreement applies to both the current cycle and the water deficit from the previous cycle.

On Monday, U.S. President Donald Trump accused Mexico of failing to comply with the water-sharing treaty between the two countries, which requires the United States to deliver 1.85 billion cubic meters of water from the Colorado River, while Mexico must supply 432 million cubic meters from the Rio Grande.

Mexico is behind on its commitments. According to Washington, the country has accumulated a deficit of more than one billion cubic meters of water over the past five years.

“This violation is severely harming our beautiful crops and our livestock in Texas,” Trump wrote on Monday.

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The Department of Agriculture said on Friday that Mexico had agreed to supply 250 million cubic meters of water starting next week and to work toward closing the shortfall.

Agriculture Secretary Brooke Rollins, quoted in the statement, said Mexico delivered more water in a single year than it had over the previous four years combined.

Trump has said that if Mexico continues to fall short of its obligations, the United States reserves the right to impose 5% tariffs on imported Mexican products.

Mexico’s Deputy Foreign Minister for North America, Roberto Velasco, said that a severe drought in 2022 and 2023prevented the country from meeting its commitments.

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International

Several people shot in attack on Brown University campus

Several people were shot on Saturday in an attack on the campus of Brown University, in the northeastern United States, local police reported.

“Shelter in place and avoid the area until further notice,” the Providence Police Department urged in a post on X. Brown University is located in Providence, the capital of the state of Rhode Island.

U.S. President Donald Trump said on his social media platform Truth Social that he had been briefed on the situation and that the FBI was on the scene.

At 5:52 p.m. local time (11:52 p.m. GMT), Brown University said the situation was still “ongoing” and instructed students to remain sheltered until further notice.

After initially stating that the suspect had been taken into custody, Trump later posted a second message clarifying that local police had walked back that information. “The suspect has NOT been apprehended,” the U.S. president said.