Connect with us

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.

Advertisement
20240920_mh_amnistia_fiscal_728x90
20240813_lechematerna_728x91
20240701_vacunacion_728x90
20231124_etesal_728x90_1
domfuturo_netview-728x90
20240604_dom_728x90
20230816_dgs_728x90
20230601_agenda_primera_infancia_728X90
CEL
previous arrow
next arrow

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.

Advertisement
20240920_mh_amnistia_fiscal_728x90
20240813_lechematerna_728x91
20240701_vacunacion_728x90
20231124_etesal_728x90_1
domfuturo_netview-728x90
20240604_dom_728x90
20230816_dgs_728x90
20230601_agenda_primera_infancia_728X90
CEL
previous arrow
next arrow

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.

Advertisement
20240920_mh_amnistia_fiscal_728x90
20240813_lechematerna_728x91
20240701_vacunacion_728x90
20231124_etesal_728x90_1
domfuturo_netview-728x90
20240604_dom_728x90
20230816_dgs_728x90
20230601_agenda_primera_infancia_728X90
CEL
previous arrow
next arrow

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.

Advertisement
20240920_mh_amnistia_fiscal_728x90
20240813_lechematerna_728x91
20240701_vacunacion_728x90
20231124_etesal_728x90_1
domfuturo_netview-728x90
20240604_dom_728x90
20230816_dgs_728x90
20230601_agenda_primera_infancia_728X90
CEL
previous arrow
next arrow

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.

Advertisement
20240920_mh_amnistia_fiscal_728x90
20240813_lechematerna_728x91
20240701_vacunacion_728x90
20231124_etesal_728x90_1
domfuturo_netview-728x90
20240604_dom_728x90
20230816_dgs_728x90
20230601_agenda_primera_infancia_728X90
CEL
previous arrow
next arrow
  • 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)

Continue Reading
Advertisement
20240920_mh_amnistia_fiscal_300x250
20240813_lechematerna_300x200_1
20240813_lechematerna_300x200_2
20240701_vacunacion_300x250
20231124_etesal_300x250_1
20230816_dgs_300x250
20230601_agenda_primera_infancia_300X250
MARN1

International

Pope Francis meets former Gaza hostages

Pope Francis met on Thursday at the Vatican with 16 Israelis who had been held hostage in Gaza for months by the Islamist group Hamas, according to the official Vatican news website.

The group consisted of ten women, four men, and two children, as reported by the same source. Several of the former hostages showed the Argentine pontiff banners or photos of their loved ones who remain in captivity.

Francis had previously met with the families of hostages in April this year and November 2023, but this was the first time he had met with individuals who had personally endured captivity.

Since the conflict between Israel and Hamas began, the pope has repeatedly called for the immediate release of Israeli hostages, while also condemning the suffering of the Palestinian population.

The war erupted on October 7, 2023, when Islamist militants attacked southern Israel, killing 1,206 people, mostly civilians, and kidnapping 251, according to an AFP tally based on official Israeli figures that include hostages who died in captivity.

Of the kidnapped, 97 are still being held in Gaza, but the Israeli military estimates that 34 of them have died.

The military offensive launched by Israel in response has killed at least 43,736 people in the Gaza Strip, mostly civilians, according to data from the Ministry of Health in the Hamas-governed territory.

Continue Reading

International

Israeli airstrikes on Damascus kill 15 and injure 16, including women and children

Israeli forces carried out airstrikes on residential buildings in the Syrian capital, Damascus, and its surroundings on Thursday, resulting in at least 15 deaths and 16 injuries, according to Syria’s Ministry of Defense and state television.

The ministry stated that around 3:20 p.m. local time (12:20 GMT), the Israeli military launched an aerial attack from the direction of the occupied Golan Heights, targeting several residential buildings in the Mazzeh neighborhood in western Damascus and the Qudsaya suburb to the northwest of the capital.

The airstrikes “resulted in the death of 15 people and injuries to 16 others, including women and children,” based on initial estimates, in addition to significant damage to private property and civilian buildings, the ministry added.

Meanwhile, state television reported Israeli airstrikes on three buildings in Mazzeh and another on a building in an educational complex located in a residential area of Qudsaya.

Following the strikes, loud explosions were heard throughout the city, and thick plumes of smoke could be seen rising from the targeted locations. Ambulances and emergency services rushed to the scene to attend to the victims.

Continue Reading

International

Drug trafficker dies after boat collision with Guardia Civil Vessel in Sanlúca

Three people were on the boat that collided with a Guardia Civil vessel around midnight at the mouth of the Guadalquivir River in Sanlúcar de Barrameda, near the Andalusian city of Cádiz, a spokesperson for the Civil Guard reported.

Two officers sustained “contusions,” the spokesperson explained.

The drug traffickers managed to bring the boat to shore, where one of them was “abandoned” severely injured. The other two fled.

The Civil Guard officers attempted to resuscitate the victim before transporting him to Sanlúcar de Barrameda, but he ultimately died early in the morning.

The other two suspects took advantage of the officers’ absence while they were taking the victim and returned to set their boat on fire.

The collision occurred very close to the site of another accident on September 1, where a drug trafficker died following a Guardia Civil pursuit.

The suspects’ boat traveled “400 meters” before crashing head-on and “at full speed” into the riverbank, where a hundred bundles of hashish were found.

Continue Reading

Trending

Central News