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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)

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International

China shows at the UN its “condemnation” of Israel for the “violation of Iran’s sovereignty”

The Chinese ambassador to the United Nations, Fu Cong, showed the “condemnation” of his country against the “violation of the sovereignty, security and territorial integrity of Iran” after the air attack launched by Israel against multiple targets in that country, the official newspaper Diario del Pueblo reports this Saturday.

That media echoes Fu’s speech to the UN Security Council on Friday, in which he demanded that Israel “immediately stop all its military actions.”

“China (…) opposes the expansion of conflicts, and is deeply concerned about the serious consequences that may arise from Israel’s actions. The intensification of regional tensions does not interest any of the parties involved,” said the Chinese emissary.

Beijing called on Tel Aviv and Tehran to “resolve their disputes through political and diplomatic means, and maintain peace and stability at the regional level jointly.”

In Fu’s view, the Israeli attack will have a “negative impact” on the negotiations on Iran’s nuclear program: “China has always been committed to the peaceful resolution of the Iranian nuclear issue through dialogue and consultations, and opposes the use of force, illegal unilateral sanctions and armed attacks on peaceful nuclear facilities.”

This Friday, China had already expressed its willingness to “play a constructive role” to curb the escalation of tensions and facilitate conciliation, in line with its traditional position of active neutrality in the region’s conflicts.

The Israeli attack, which according to Tehran caused dozens of deaths, including senior military commanders and at least six nuclear scientists, targeted key facilities such as the uranium enrichment plant in Natanz. Numerous civilian casualties were also reported.

Israel justified the offensive by claiming that the Iranian regime is secretly developing a program to manufacture nuclear weapons.

For his part, Iran’s supreme leader, Ali Khamenei, promised a “severe response” and assured that the attack would reveal the “evil nature” of Israel.

UN Secretary-General António Guterres also expressed concern about the bombing, at a time when Iran and the US The United States is holding talks about the Iranian nuclear program.

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International

Donald Trump’s government pauses its program of indiscriminate raides against migrants

The government of US President Donald Trump has decided to pause its campaign of discretionary roundings against migrants in certain areas due to its apparent concern about the growing unpopularity of these methods, according to The New York Times newspaper on Friday.

According to an email to which the newspaper has had access and the confirmation of US officials, the Executive has ordered the Immigration and Customs Control Service (ICE) to pause the beatings that affect the agricultural industry and the hospitality industry.

The spokeswoman for the Department of Homeland Security, Tricia McLaughlin, confirmed in a statement that “the president’s instructions” will be obeyed and the portfolio will also continue to “work to get the worst illegal foreign criminals out of the streets of the United States.”

The decision points out that this campaign of discretionary arrests to try to deport large-scale immigrants is harming industries and electoral constituencies whose support Trump wants to retain for next year’s legislative elections.

The new instructions were transmitted to ICE in an email sent last Thursday asking that “all investigations/law enforcement operations be suspended in work centers in the agricultural sector (including aquaculture and meat packing plants), restaurants and hotels.”

These new guidelines come in turn after more than a week of intense protests in Los Angeles against this immigration policy and that Trump himself admitted that the raids seem to be affecting the agricultural sector, which in states like California, where beatings have intensified, depend almost exclusively on immigrant labor.

Since his return to the White House in January, Trump has implemented an aggressive policy of hard hand against immigration and as a sample of his Cabinet officials recently held a meeting with the ICE leadership to order them to carry out 3,000 arrests a day, a mandate that seems to be behind the intensification of the raids.

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International

Trump says he knew “everything” about the attack on Iran and assures that the dialogue remains open

US President Donald Trump said on Friday that Washington “known everything” about the Israeli attack on Iran and that the dialogue on Tehran’s nuclear program “is not dead.”

“We knew everything and I tried to avoid Iran all this humiliation and death. I tried hard to avoid it because I would have loved to see an agreement,” Trump said in an interview with Reuters.

The US president insisted on what he wrote today about the attack on social networks, where he said he gave an ultimatum of 60 days to Tehran to reach an agreement.

“We knew practically everything. We knew enough to give Iran 60 days to reach an agreement and today it is already 61 days,” he explained in the interview, in which he said he did not know what the current situation of the Iranian nuclear program is after the attack launched by Israel, which also ended the lives of key military leaders of the Persian country.

Regarding the dialogue between the US and Iran about the nuclear program of the ayatollahs, Trump assured that “he is not dead”, that “an agreement is still possible” and also recalled that on Sunday a sixth round of dialogue is scheduled in Muscat (Oman) that they consider is now in the air.

“We have a meeting with them on Sunday. Now, I’m not sure if that meeting will take place, but we have a meeting with them on Sunday,” he said.

The United States and Iran have held five rounds of talks on the Iranian nuclear program since April, with Washington demanding that Tehran discard its capabilities both to manufacture an atomic bomb and to enrich uranium, something that the ayatollahs considered unacceptable.

Both Israel and Trump himself had warned of possible preventive attacks on the Persian country due to this refusal by Iran.

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