International
NASA spaceship deflected asteroid in test to save Earth
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.
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.
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.
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.
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
Joe Biden finishes prostate cancer radiotherapy at Penn Medicine
Former U.S. President Joe Biden completed his prostate cancer radiotherapy on Monday, a condition he has been managing since 2023.
The 82-year-old touched a ceremonial bell at Penn Medicine in Pennsylvania after his final session, according to a video posted on Instagram by his daughter, Ashley Biden. She expressed gratitude to the doctors and nurses for the care her father received during his treatment.
A spokesperson for Biden told ABC News that it is currently unclear whether the former president will need to continue radiotherapy.
Biden’s prostate cancer was detected during a routine check-up. According to his medical team, it was a localized, slow-growing tumor. At the time of diagnosis, doctors indicated a positive prognosis with no signs of metastasis.
Central America
White House targets Nicaragua over human rights and labor violations
The White House is considering imposing new tariffs of up to 100% on Nicaragua or removing the country from the benefits of the CAFTA-DR free trade agreement, the Office of the United States Trade Representative (USTR) reported Monday.
The USTR determined that Nicaragua’s policies under the Ortega-Murillo regime regarding violations of labor and human rights, as well as the dismantling of the rule of law, are “unreasonable” and constitute a burden on commerce.
The resolution follows an investigation that began on December 10, 2024, when the USTR, based on recommendations from the Section 301 Committee and other advisory bodies, started reviewing the practices of Nicaragua’s government. The process included a public hearing and more than 160 comments and testimonies, including evidence of severe human rights abuses that have been forwarded to the U.S. State Department for evaluation and follow-up.
The report published Monday extensively documents how Nicaragua’s authoritarian practices — including the repression of fundamental freedoms — create a high-risk environment for U.S. businesses and investments.
International
Zelenskyy: Meeting with Trump “Positive” Despite Rejected Missile Request
Ukrainian President Volodymyr Zelenskyy described his reportedly tense meeting with U.S. President Donald Trump last week as “positive,” despite failing to secure Tomahawk missiles for Ukraine. He emphasized what he said was the continued U.S. interest in economic cooperation with Kyiv.
Zelenskyy said Trump backed away from the possibility of sending long-range missiles to Ukraine after a phone call with Russian President Vladimir Putin, held just hours before the U.S. and Ukrainian leaders met on Friday.
“In my view, he doesn’t want an escalation with the Russians until he meets with them,” Zelenskyy told reporters Sunday. His remarks were embargoed until Monday morning.
Ukraine is seeking to purchase 25 Patriot air defense systems from U.S. manufacturers using frozen Russian assets and assistance from partners. However, Zelenskyy noted that acquiring all of them will take time due to long production lines. He said he discussed with Trump potential support to accelerate procurement, possibly through European partners.
According to Zelenskyy, Trump stated during their meeting that Russian President Vladimir Putin’s sweeping demands — that Ukraine cede the entire eastern regions of Donetsk and Luhansk — remain unchanged.
Zelenskyy was diplomatic when describing his encounter with Trump, though reports suggest he faced pressure to accept Putin’s terms — a strategy Trump has reportedly maintained since the tense Oval Office confrontation on February 28, when the Ukrainian leader was publicly scolded for not being “grateful enough” for U.S. aid.
Still, Zelenskyy said that since Trump ultimately supported maintaining the current front line, the overall message was “positive” for Ukraine.
Joe Biden finishes prostate cancer radiotherapy at Penn Medicine
White House targets Nicaragua over human rights and labor violations
Zelenskyy: Meeting with Trump “Positive” Despite Rejected Missile Request
Tec de Monterrey honors one of its students for his contribution to nanotechnology in medicine
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