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.

20250501_mh_noexigencia_dui_728x90

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.

20250501_mh_noexigencia_dui_728x90

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.

20250501_mh_noexigencia_dui_728x90

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.

20250501_mh_noexigencia_dui_728x90

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.

20250501_mh_noexigencia_dui_728x90

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

Guatemala considers sending high-risk gang members to military prisons

Amid the escalating crisis in Guatemala’s prison system, the government is considering transferring high-risk gang members to military-run detention facilities, a move that analysts say could help address overcrowding and the lack of control in civilian prisons.

The debate has gained urgency following the killing of ten police officers by gang members, reportedly in retaliation after the government refused to meet demands made by Aldo Dupie Ochoa, alias “El Lobo,” leader of the Barrio 18 gang, which authorities identified as responsible for the attack.

Guatemala’s Minister of Defense, Henry David Sáenz, told local media that the possibility of relocating high-danger inmates to military brigades has not been formally discussed. However, he noted that the practice is not new to the Armed Forces and said it is something that “was already being done.”

One example is the detention center located within the Mariscal Zavala Military Brigade, in Zone 17 of Guatemala City, where several inmates are held under military supervision. The facility also houses high-profile detainees, including former official Eduardo Masaya, who faces corruption charges.

In 2015, a ministerial agreement authorized the establishment of the Zone Seventeen Detention Center within the brigade, with a maximum capacity of 114 inmates in Area A and 21 in Area B. The agreement specified that the facility would be used exclusively for civilians or military personnel considered at risk of assassination.

20250501_mh_noexigencia_dui_728x90

Additionally, since 2010, a prison has operated within the Matamoros Barracks in Zone 1 of Guatemala City, holding dangerous or high-profile inmates. However, media outlets have described these military detention centers as “VIP prisons,” particularly for former government officials such as ex-president Otto Pérez Molina.

International

Rights group says over 5,000 killed in Iran protests, mostly civilians

A U.S.-based human rights group said on Friday it has confirmed that more than 5,000 people were killed during the recent protests in Iran, most of them civilians allegedly shot by security forces.

Non-governmental organizations monitoring the toll from the crackdown on what have been described as the largest demonstrations in Iran in years said their work has been hampered by an internet shutdown imposed by authorities since January 8. They warned that the actual death toll is likely significantly higher.

The Human Rights Activists News Agency (HRANA), based in the United States, reported on Friday that it had verified the deaths of 5,002 people, including 4,714 protesters, 42 minors, 207 members of the security forces, and 39 bystanders.

The group added, however, that it is still investigating an additional 9,787 possible deaths, underscoring the difficulty of independently confirming information amid ongoing restrictions and repression.

International

Japan reopens Kashiwazaki-Kariwa Plant despite public concerns

La centrale nucléaire japonaise de Kashiwazaki-Kariwa, la plus grande au monde, a repris ses activités mercredi pour la première fois depuis la catastrophe de Fukushima en 2011, malgré les inquiétudes persistantes d’une partie de la population.

La remise en service a eu lieu à 19h02 heure locale (10h02 GMT), a indiqué à l’AFP Tatsuya Matoba, porte-parole de la compagnie Tokyo Electric Power (Tepco).

Le gouverneur de la préfecture de Niigata, où se situe la centrale, avait donné son feu vert à la reprise le mois dernier, en dépit d’une opinion publique divisée. Selon une enquête menée en septembre par la préfecture elle-même, 60 % des habitants se déclaraient opposés au redémarrage, contre 37 % favorables.

Mardi, plusieurs dizaines de manifestants ont bravé le froid et la neige pour protester près de l’entrée du site, sur les rives de la mer du Japon.

« L’électricité de Tokyo est produite à Kashiwazaki. Pourquoi seuls les habitants d’ici devraient-ils être exposés au danger ? Cela n’a aucun sens », a déclaré à l’AFP Yumiko Abe, une riveraine de 73 ans.

20250501_mh_noexigencia_dui_728x90

La centrale de Kashiwazaki-Kariwa avait été mise à l’arrêt lorsque le Japon a fermé l’ensemble de ses réacteurs nucléaires à la suite du triple désastre de mars 2011 — un séisme, un tsunami et un accident nucléaire — survenu à Fukushima.