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
Millions to join “No Kings” march in U.S. amid Trump’s growing authoritarian backlash
Millions of Americans are set to take to the streets this Saturday in more than 2,500 cities across the United States for the second edition of the “No Kings” march, a massive protest organized by progressive groups and activists against what they describe as the authoritarian direction of President Donald Trump’s second administration.
The demonstration, expected to be the largest since Trump’s return to power, comes amid a federal government shutdown, further heightening political tensions in Washington.
From the White House, press secretary Abigail Jackson dismissed the event with a brief “Who cares?”, while senior Republican leaders labeled the march as an act of “hate against America.”
House Speaker Mike Johnson accused Democrats of blocking negotiations to reopen the government and claimed they were “unable to stand up to their raging base.” He also linked the protests to “supporters of Hamas and the Antifa terrorist group.”
President Donald Trump, in an interview with Fox News, blamed Senate Democratic leader Chuck Schumer for the legislative deadlock.
“He’s got nothing else left to do. Everyone’s hitting him hard,” Trump said.
The organizers — a coalition of Democratic leaders and more than 200 civil society and labor groups — argue that the Republican refusal to reopen the government is a clear symptom of the authoritarianism they seek to denounce.
The main rally will take place in Washington, D.C., which has been under heightened National Guard surveillance for weeks, officially to control rising crime. However, organizers contend the deployment is aimed at intimidating and silencing dissent.
Protesters have been urged to wear yellow, a reference to the 2019 pro-democracy movement in Hong Kong.
“With this color, we align ourselves with a historical context and remind the world that power must come from the people, not from crowns,” organizers stated on their website.
In addition to the capital, large marches are scheduled in New York, San Francisco, Boston, Atlanta, Chicago, Kansas City, and Honolulu, as well as abroad in London, Paris, Frankfurt, and several Spanish cities — Madrid (Puerta del Sol), Barcelona (Plaça Sant Jaume), Seville (Plaza Nueva), and Málaga (Plaza de la Marina).
During the first edition, held in June, the movement gathered around five million people, a figure organizers expect to surpass this weekend.
International
Petro expresses concern over fatal shooting during mass protests in Lima
Colombian President Gustavo Petro voiced his “concern” on Thursday over recent events in Peru, following the death of a protester reportedly shot during a massive demonstration in Lima against the government and Congress.
“I must express my concern over the events in Peru. A young artist has been killed in citizens’ protests,” Petro wrote on X (formerly Twitter).
The Colombian leader also noted that in Peru, “a popularly elected president remains imprisoned without conviction,” referring to Pedro Castillo, who led the country from July 2021 to December 2022 until he was removed by Congress following a failed attempted coup.
“This is a blatant violation of the American Convention on Human Rights,” Petro stated, adding, “I hope Peru seeks social and political dialogue to legitimize its public institutions.”
On Wednesday, Peru experienced widespread protests in several cities, with the largest demonstration in Lima in recent years, driven by citizens’ concerns over corruption and public insecurity.
During the capital’s mobilization, the Ombudsman’s Office confirmed the death of Eduardo Ruiz, 32, and reported clashes that left over 100 injured, including 78 police officers and 24 protesters, as well as ten arrests.
The Attorney General’s Office, investigating Ruiz’s death “in the context of serious human rights violations,” confirmed that the protester was shot.
International
Peru’s interim president José Jerí refuses to resign after protester’s death in Lima
Peru’s interim president, José Jerí, stated Thursday that he has no intention of resigning from the post he assumed last Friday, following the removal of former president Dina Boluarte, despite growing unrest over the death of a protester during massive demonstrations in Lima on Wednesday.
“I will not resign,” Jerí declared outside the Government Palace in Lima, where he returned on foot after making a surprise visit to Congress headquarters alongside Prime Minister Ernesto Álvarez.
Earlier, after leaving the Legislative Palace, the president acknowledged that the country is going through “difficult times” and condemned what he described as “a small group attempting to impose an agenda different from the citizens’ expression of discontent.”
Jerí expressed condolences for the death of Eduardo Ruiz, a 32-year-old man who died during Wednesday’s protest against the government and Congress, amid growing anger over corruption and insecurity.
“We stand in solidarity with his family,” he said, without offering further details about the incident, which has sparked outrage among Peruvians.
The president also described the demonstrations as “a legitimate civic expression” that later turned violent due to “certain groups seeking to provoke chaos by exploiting a peaceful citizen movement.”
“In a state governed by the rule of law, the rights of both demonstrators and security forces must be protected,” Jerí emphasized, adding that “as a result of that situation, this unfortunate death occurred outside the main area where the protest was taking place.”
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