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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)

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International

Paris prosecutors alert U.S. over alleged deepfake strategy linked to Elon Musk

The Paris Prosecutor’s Office said on Saturday that it had alerted authorities in the United States over suspicions that tech entrepreneur Elon Musk may have encouraged the spread of sexualized deepfake content on the social platform X to artificially boost the company’s valuation.

According to prosecutors, the controversy surrounding explicit AI-generated videos—reportedly linked to Grok, the platform’s artificial intelligence system—may have been deliberately triggered to increase the market value of X and X AI.

The office added that the alleged strategy could be tied to the planned June 2026 public listing of a new entity formed through the merger of SpaceX and X AI.

French authorities said they contacted the U.S. Department of Justice as well as legal representatives at the U.S. Securities and Exchange Commission (SEC) earlier this week to share their concerns.

Responding on X in French to a report about the case, Musk referred to French prosecutors using an offensive term.

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When contacted, X’s legal representative in France did not immediately comment.

Grok, the platform’s AI system, has its own account on X, allowing users to interact with it or request content generation. For a period, users were able to tag the bot in posts to generate or edit images, a feature that may have facilitated the spread of such material.

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International

Netanyahu vows to target Iran’s leadership after missile strikes in southern Israel

Israeli Prime Minister Benjamin Netanyahu vowed on Sunday to target Iran’s leadership directly, escalating rhetoric amid ongoing hostilities between Israel and Iran.

Speaking during a visit to the southern city of Arad, which was struck by an Iranian missile a day earlier, Netanyahu said Israel would intensify its response against Tehran.

“We are going after the regime. We are going after the Islamic Revolutionary Guard Corps, that gang of criminals,” he told reporters while standing among the debris left by the தாக்க.

He added that Israel intends to strike “personally” at Iran’s leadership, as well as its facilities and economic assets.

In addition to Arad, Iranian missiles also hit the city of Dimona on Saturday. The area is widely believed to host Israel’s undeclared nuclear facilities. The strike caused significant damage following a direct impact.

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Netanyahu also visited Dimona, where he urged residents to strictly follow military instructions and seek shelter whenever warning sirens are activated.

“The entire nation is a front line, and the home front is also a front line. And when we are on the front line, we follow these instructions,” he said.

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International

US panel backs Trump-themed coin amid controversy

The United States Department of the Treasury confirmed to AFP that the Commission of Fine Arts approved the design of a new collectible coin featuring Donald Trump, with members of the commission appointed by the current administration.

According to the proposal, the coin will feature an image of Trump standing with clenched fists over a desk on the obverse, while the reverse will display an eagle, a traditional symbol of the United States.

The sale price of the collectible has not yet been disclosed, although the United States Mint typically offers similar items for more than $1,000.

“There is no more iconic portrait for the front of these coins than that of our president Donald Trump,” U.S. Treasurer Brandon Beach said in a statement sent to AFP. He added that two additional coins — a $1 piece and a one-ounce gold coin — are also under consideration.

However, the Citizens Coinage Advisory Committee (CCAC), another body responsible for reviewing new coin proposals, declined to discuss the Trump design in late February.

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“Only nations governed by kings or dictators place the image of a sitting leader on their currency,” said Donald Scarinciat the time. “No country in the world has minted coins featuring a democratically elected leader during their term in office,” he added.

When contacted by AFP, the Treasury Department did not immediately respond to requests for further comment.

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