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.
International
U.S. Issues Urgent Evacuation Call for Citizens in Venezuela
The U.S. Department of State on Saturday urged American citizens currently in Venezuela to leave the country “immediately,” citing an increasingly unstable security situation.
In a security alert, the State Department warned of reports involving armed militia groups, known as colectivos, that have set up checkpoints and are stopping vehicles to search for evidence of U.S. citizenship or support for the United States.
The warning comes one week after U.S. forces captured Venezuela’s ousted president, Nicolás Maduro, and his wife, Cilia Flores, during a bombing operation in Caracas. Both were transferred to New York to face trial on narcotics trafficking charges.
U.S. authorities emphasized that the volatile security environment poses significant risks to American nationals and reiterated their long-standing advisory against travel to Venezuela.
International
U.S. strike in Caracas killed 32 cuban security officers, experts say surprise was crucial
Two days after a U.S. military attack on a military complex in Caracas, Havana confirmed that 32 members of its security forces were killed in the operation, some of whom were likely responsible for protecting Venezuelan leader Nicolás Maduro. The Venezuelan government also reported that 23 of its own military personnel died during the assault.
Of the Cuban dead, 21 belonged to the Ministry of the Interior, which oversees intelligence services, and 11 were from the Revolutionary Armed Forces. No official information has been released regarding potential injuries.
Experts consulted by AFP agreed that the element of surprise was the key to the success of the U.S. military operation, which was meticulously prepared over months and kept entirely secret. “Cuban intelligence … convinced the Maduro regime and its security agencies that the United States would never attack Venezuelan territory,” explained José Gustavo Arocha, a former Venezuelan army officer and expert at the Center for a Secure Free Society, a U.S. defense think tank.
Fulton Armstrong, a former U.S. intelligence officer and Latin America researcher at American University in Washington, also highlighted the failure to anticipate the attack and to detect U.S. helicopters entering Venezuelan airspace, noting that even a five- to ten-minute warning could have made a significant difference for the guards and for Maduro.
U.S. forces additionally benefited from “incredible” real-time intelligence provided by stealth drones to monitor movements of the Venezuelan leader, according to experts. A highly sophisticated combat team was deployed, and analysts believe the order to “fire to kill” was likely given.
Paul Hare, former British ambassador to Cuba and Venezuela, added that Cuban intelligence also underestimated the extent of U.S. access to internal cooperation within Venezuela’s security apparatus, contributing to the operation’s success.
International
Report: Vatican mediation included russian asylum offer ahead of Maduro’s capture
The Vatican reportedly attempted to negotiate an offer of asylum in Russia for Venezuelan President Nicolás Maduro before his capture by U.S. forces last Saturday, according to The Washington Post.
The U.S. newspaper reported that Vatican Secretary of State Cardinal Pietro Parolin spoke with U.S. Ambassador to the Holy See Brian Burch about a supposed Russian proposal to grant Maduro asylum. A source familiar with the offer said that what was proposed “was that he would leave and be able to enjoy his money,” and that part of the plan involved Russian President Vladimir Putin guaranteeing Maduro’s security.
Despite these diplomatic efforts, the United States carried out a military operation that resulted in Maduro’s capture and detention, along with his wife Cilia Flores, who are now being held in New York on narcoterrorism charges.
The Washington Post also noted that U.S. President Donald Trump may have invited Maduro to Washington for in-person discussions about safe conduct, an offer that Maduro reportedly declined.
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