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
Colombia reaches $4.5 billion deal to acquire 17 Gripen Fighter Jets from Saab
The Colombian government has finalized a negotiation agreement with the Swedish company Saab for the purchase of 17 SAP-39 Gripen fighter jets, valued at more than $4.5 billion, according to local media reports.
Colombian outlets indicated that payments are scheduled to begin in 2026, starting with an initial installment of 100 billion Colombian pesos. However, the aircraft will be delivered between 2027 and 2032, when the final jet is expected to arrive in Colombia.
This new contract represents the second-largest public purchase made by Colombia so far this century, surpassed only by the investment in the Bogotá metro system, local media noted.
The agreement is expected to be officially signed during the ceremony commemorating the 216th anniversary of the Colombian Aerospace Force, to be held in Cali on November 14 of this year.
International
Venezuela accuses U.S. of using Naval Deployment to pressure Maduro government
The world’s largest aircraft carrier, the USS Gerald R. Ford, joined the U.S. Navy’s anti-drug operation in Latin America on Tuesday—a deployment Venezuela has condemned as an attempt to pressure President Nicolás Maduro from power.
In a statement, the U.S. Southern Command confirmed that the carrier, ordered to deploy nearly three weeks ago, has entered its area of responsibility, which includes Latin America and the Caribbean.
“The world’s largest aircraft carrier will strengthen the United States’ ability to detect, monitor, and dismantle illicit actors and activities that threaten the security and prosperity of U.S. territory and our safety in the Western Hemisphere,” said Pentagon spokesperson Sean Parnell.
According to the White House, the U.S. government under Donald Trump has carried out about twenty operations in the Caribbean and the Pacific since early September, resulting in the deaths of 76 suspected drug traffickers.
However, U.S. authorities have not yet presented evidence that the targeted vessels were being used for drug trafficking or posed a direct threat to the country.
The operations have raised concerns in Caracas, where the Maduro administration views the deployment as a strategic move aimed at provoking regime change in Venezuela.
International
Venezuela mobilizes forces nationwide as tensions with U.S. rise
Venezuela’s armed forces launched a “massive” nationwide deployment on Tuesday in response to what the government calls “imperialist threats” from the United States, which continues its anti-drug military operation in the region and is preparing for the arrival of its most advanced aircraft carrier.
Since late August, U.S. forces have maintained a growing presence in the Caribbean to combat alleged drug trafficking originating from Colombia and Venezuela. The operation has resulted in the bombing of 20 vessels in international waters in the Caribbean and Pacific, leaving 76 people dead.
Venezuelan authorities claim the U.S. mission is aimed at toppling President Nicolás Maduro. While insisting he seeks peace, Maduro has repeatedly warned the country is prepared to defend itself and has frequently showcased military activities.
A statement from Venezuela’s Defense Ministry said the deployment includes land, air, naval, river and missile systems; armed forces units; the Bolivarian militia; and additional police, military and civilian defense structures.
State broadcaster VTV aired speeches from military leaders in various states, along with images of troops mobilizing and equipment being positioned.
However, analysts note that these frequent and highly publicized announcements do not always lead to visible operations on the ground.
On Monday, Maduro cautioned that Venezuela has the “strength and power” to respond to any aggression, including mobilizing civilians. “If imperialism were to strike and do harm, from the moment the order is given, the entire Venezuelan people would mobilize and fight,” he warned.
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