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
Florida officials warn against raw milk after dozens sickened
Unprocessed milk from a farm in Florida has sickened at least 21 people, prompting state authorities to issue a public health alert, U.S. media reported Monday.
The 21 cases include six children under the age of 10, all diagnosed with infections caused by E. coli and Campylobacterbacteria linked to raw milk from the farm in the southeastern U.S. state. Local authorities have also warned about the dangers of drinking unpasteurized milk.
Seven people have been hospitalized, two of whom have suffered complications, according to multiple reports.
The Florida Department of Health has urged the public to avoid raw milk consumption and blamed the outbreak on the farm involved—without naming it directly—citing poor sanitary practices.
Florida law prohibits the sale of unprocessed milk for human consumption, although it can be sold if labeled for pets. Pasteurization, which involves heating milk to kill harmful bacteria, is required under U.S. federal regulations for any dairy products sold across states.
Despite these regulations, sales of raw milk have been increasing in recent years, fueled by online promotion from wellness influencers and advocates of unprocessed foods.
The U.S. Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC) warn that raw milk can contain potentially deadly bacteria such as E. coli, Campylobacter, Listeria, or Salmonella, which can cause symptoms ranging from diarrhea, vomiting, and indigestion to severe complications like kidney failure.
International
Massive wildfire in Southern France kills one, injures nine
Hundreds of firefighters battled on Wednesday to contain a massive wildfire in southern France that has left one person dead and nine others injured.
The blaze, which broke out Tuesday in the Aude department, is the largest recorded in France during the current summer season. Authorities have deployed 1,800 firefighters in an effort to bring it under control.
An elderly woman died in her home in the town of Saint-Laurent-de-la-Cabrerisse, while two others were injured—one in serious condition due to burns—according to the local prefecture. Seven firefighters suffered smoke inhalation injuries, and one person remains missing. The wildfire has already scorched an estimated 12,000 hectares of land.
“The fire is spreading very quickly due to unfavorable weather conditions. This is one of the driest areas of the department, and strong winds are fueling the flames,” said Lucie Roesch, secretary general of the Aude prefecture. Rémi Recio, subprefect for the city of Narbonne, added, “The fire is still spreading and is far from being contained or under control.”
The A9 motorway, which runs along the Mediterranean coast between France and Spain, has been closed in both directions between Narbonne and Perpignan, along with numerous secondary roads.
In Saint-Laurent-de-la-Cabrerisse, the smell of smoke lingers over the charred hectares. A helicopter was seen drawing water from the river below the village and dropping it several kilometers away, AFP reporters observed.
A campsite and at least one village were partially evacuated, with 25 houses and around 35 vehicles damaged, according to a preliminary assessment.
French Prime Minister François Bayrou announced he will visit the affected area on Wednesday.
International
Japan marks 80 years since Hiroshima bombing with call for nuclear disarmament
Japan observed a minute of silence on Wednesday to mark the 80th anniversary of the atomic bombing of Hiroshima, a solemn reminder to the world of the horror it unleashed, amid heightened tensions between nuclear powers the United States and Russia.
At exactly 8:15 a.m. local time (23:15 GMT), the moment when the U.S. bomber Enola Gay dropped the “Little Boy” atomic bomb on August 6, 1945, the city paused to remember.
The bombing claimed an estimated 140,000 lives, not only from the devastating blast and fireball but also from the deadly radiation that followed. Three days later, another bomb dropped on Nagasaki killed 74,000 more. Japan’s surrender on August 15 marked the end of World War II.
On a sweltering morning, hundreds of students, survivors, and officials dressed in black laid flowers at the Hiroshima Peace Memorial. The city’s mayor, Kazumi Matsui, warned of “an accelerating trend toward military buildup worldwide,” citing Russia’s invasion of Ukraine and the ongoing war in the Middle East.
Japanese Prime Minister Shigeru Ishiba stated that Japan has a mission “to take the lead toward a world without nuclear weapons.”
Today, Hiroshima is a thriving metropolis of 1.2 million people, yet the skeletal remains of one building still stand at its center as a powerful reminder of the tragedy.
Wednesday’s ceremony was attended by representatives from around 120 countries and regions, including delegates from Taiwan and Palestine for the first time.
Among the attendees was 96-year-old Yoshie Yokoyama, who arrived in a wheelchair accompanied by her grandson. She told reporters that her parents and grandparents were victims of the bombing.
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