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
Six killed, including baby, in armed attack near tourist beach in Ecuador
Six people, including a baby girl about two years old, were killed on Sunday in an armed attack near a tourist beach in southwestern Ecuador, police said. The shooting, carried out with rifles, also left three people wounded.
The incident took place in the coastal town of Puerto López, in the province of Manabí, a popular tourist destination known for whale watching. The attack occurred amid a surge of violence over the weekend that left at least nine people dead nationwide, according to local media reports.
“There are six fatalities and three injured,” Colonel William Acurio, the local police commander, told reporters on Sunday. He confirmed that one of the victims was a baby “approximately two years old.”
Authorities have not released further details about the motive behind the attack or whether arrests have been made.
International
Man accused of killing nine in Paramaribo dies by suicide in police custody
The man who killed nine people, including five children, on Saturday night in Paramaribo died by suicide while in custody, Suriname police confirmed in a statement on Monday.
The suspect, identified by the initials D.A., 43, “hanged himself inside a holding cell at the Keizerstraat police station” in the capital, Paramaribo, according to the official report.
Police said the man sustained leg injuries during his arrest and was taken to a hospital before being transferred to the detention facility on Sunday night. Authorities did not provide further details on the circumstances surrounding his death.
International
Winter storm disrupts holiday travel, forcing 1,500 flight cancellations in the U.S.
Airlines canceled around 1,500 flights across the United States during the peak Christmas travel season after warnings of a severe winter storm and forecasts of heavy snowfall in the Midwest and Northeast. An additional 5,900 flights were delayed due to adverse weather conditions.
More than 40 million Americans were under snowstorm warnings or weather advisories one day after Christmas. Meanwhile, another 30 million people faced flood or storm alerts in California, where an atmospheric river triggered intense rainfall.
New York City was bracing for up to 25 centimeters (10 inches) of snow overnight, which would mark its heaviest snowfall in four years. Cold weather was expected to persist through the weekend in the nation’s largest city. According to flight-tracking website FlightAware, airports in the New York area recorded about 850 flight cancellations.
Six killed, including baby, in armed attack near tourist beach in Ecuador
Man accused of killing nine in Paramaribo dies by suicide in police custody
Winter storm disrupts holiday travel, forcing 1,500 flight cancellations in the U.S.
Tec de Monterrey honors one of its students for his contribution to nanotechnology in medicine
Defense Minister commends salvadoran soldier for Central American Cross Country victory
Extension of the state of emergency approved in southern Chile
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