International

NASA spaceship deflected asteroid in test to save Earth

Photo: Jim Watson / AFP

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.

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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.

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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.

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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.

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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

Artemis II crew prepares for Earth return and splashdown recovery

Astronauts from the Artemis II mission are expected to be extracted from the Orion spacecraft approximately two hours after splashdown, scheduled for 20:07 UTC this Friday (6:07 p.m. in San Salvador), according to NASA.

Following recovery, a rescue team will transport the crew by aircraft to the USS John P. Murtha. Once onboard, they will undergo medical evaluations before boarding another flight to the Johnson Space Center.

On Thursday, NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, along with Canadian astronaut Jeremy Hansen from the Canadian Space Agency, continued preparations for their return to Earth.

Their activities include stowing equipment used during the mission, securing cargo and storage compartments, and installing and adjusting crew seats to ensure all items are properly fastened. The crew will also review the latest weather updates, recovery operations status, and reentry timeline, while preparing for post-landing procedures.

At 21:53 UTC (9:53 p.m. in San Salvador), Orion’s thrusters are scheduled to perform a second trajectory correction maneuver, refining the spacecraft’s path back to Earth. During this operation, Hansen will monitor guidance, navigation, and propulsion systems.

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NASA explained that during Friday’s reentry, the service module will separate about 20 minutes before Orion reaches the upper atmosphere southeast of Hawaii. If necessary, a final trajectory adjustment will fine-tune the flight path before the capsule begins a series of roll maneuvers to safely distance itself from jettisoned components.

Just before atmospheric interface, Orion will reach a peak speed of approximately 3,800 km/h. As it descends to about 400,000 feet (around 121.9 km), communications will be interrupted for approximately six minutes due to plasma formation around the capsule during peak heating.

NASA expects the crew to experience up to 3.9 G during a nominal reentry profile. After exiting the blackout phase, the capsule will jettison its forward bay cover. Drogue parachutes will deploy at around 22,000 feet (6.7 km), followed by the three main parachutes at approximately 6,000 feet (1.8 km).

Artemis II marks NASA’s first crewed flight test of the Space Launch System (SLS) rocket and Orion spacecraft around the Moon. The mission aims to validate capabilities for deep space human exploration and lay the groundwork for future long-term scientific missions on the lunar surface.

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International

Flooding in Dominican Republic leaves child dead and thousands affected

A two-year-old girl died after a wall of her home collapsed amid severe flooding that struck Dominican Republic on Wednesday. The heavy rains also caused power outages, school closures, and reduced working hours across affected areas.

Authorities issued preventive alerts in 15 of the country’s 31 provinces due to intense rainfall accompanied by thunderstorms that began Tuesday night.

Juan Méndez, director of the Center of Emergency Operations (COE), confirmed the child’s death to the press. The incident occurred in Santo Domingo Oeste, part of the capital region.

According to Red Cross officials, the girl died when a wall in her home collapsed following a landslide triggered by hours of heavy rain.

President Luis Abinader provided an update from the COE, stating that government agencies had been mobilized since early morning, particularly in Greater Santo Domingo, to protect lives and minimize material damage.

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Floodwaters left several vehicles submerged, while others were swept away by strong currents. Authorities estimate that around 250,000 families have been affected by the flooding.

Earlier, Public Administration Minister Sigmund Freund announced reduced working hours, encouraging remote work for those facing transportation difficulties, while maintaining in-person operations for essential services.

International

Bill Gates to testify before Congress over Epstein connections

Bill Gates is set to testify on June 10 before a congressional committee in United States investigating links connected to the late sex offender Jeffrey Epstein, a source familiar with the matter told AFP on Tuesday.

The Microsoft co-founder is among several high-profile figures named in documents released by the Department of Justice, which detail alleged close associations, questionable financial dealings, and private photographs involving Epstein.

According to a spokesperson cited by Politico, Gates “welcomes” the opportunity to appear before the committee. The representative emphasized that Gates “never attended or participated in any illegal activities with Epstein” and is prepared to answer questions to support the investigation.

The Bill & Melinda Gates Foundation did not immediately respond to AFP’s request for comment.

In late February, Gates told members of his foundation’s board that his association with Epstein was a “huge mistake.” He has consistently denied any involvement in the financier’s criminal activities. Epstein died by suicide in prison in 2019 while awaiting trial on charges of sex trafficking minors.

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“I did nothing illegal. I saw nothing illegal,” Gates said, according to a recording obtained by The Wall Street Journal.

Gates acknowledged that his relationship with Epstein began in 2011, three years after Epstein pleaded guilty to soliciting prostitution from a minor.

A draft email written by Epstein and released by the Department of Justice referenced alleged extramarital relationships involving Gates. The message, which was apparently never sent, claimed that Epstein had helped “Bill” obtain medication related to encounters with Russian women.

Gates admitted to having had two extramarital affairs but denied any involvement with Epstein’s victims.