NASA launches first ever asteroid deflection mission
A spacecraft has been launched from California this morning carrying with it humanity’s greatest hopes of being able to protect our planet from a cataclysmic asteroid impact.
Fortunately the DART (Double Asteroid Redirection Test) mission is only a test, and if anything goes wrong before it intercepts its target next September, then Earth won’t suffer as a result.
But the stakes are high. Scientists including Stephen Hawking have described impact events as among the greatest threats facing humanity – and even if the DART planetary defence mission proves successful, huge questions about our future readiness will remain.
The DART spacecraft’s collision will be observed by the LICIACube satellite. Pic: NASA
DART launched on top of a SpaceX Falcon 9 rocket at the Vandenberg Space Force base in California.
Roughly the size of a small car, the spacecraft has been developed by NASA and the Johns Hopkins Applied Physics Laboratory to demonstrate for the first time the “kinetic impactor technology” using a direct hit on an asteroid to adjust its speed and path.
A small LICIACube satellite developed by the Italian space agency will travel alongside it to observe the collision which will take place when DART and its target asteroid are within 11 million kilometres of Earth, enabling ground-based telescopes to measure the impact too.
DART is targeting a near-Earth double asteroid known as Didymos and Dimorphos, with the latter being a “moonlet” estimated to be about 160 metres in size – a good test object, but not one that is actually expected to collide with Earth.
It will hit Dimorphos at a speed of roughly 6.6 kilometres per second and, in doing so, shorten its orbit about Didymos – proving that a kinetic impact can change an asteroid’s trajectory.
This nudge technique is preferred to blowing asteroids apart in the style of the film Armageddon, because the fragments from such an explosion could continue to imperil the planet.
A study from researchers at Johns Hopkins University in the US published in 2019 warned that for objects large enough to be targeted it was likely the blasted away fragments would reform under gravity.
The DART spacecraft is just the size of a small car, not including its solar arrays. Pic: NASA
How important is the mission?
The good news is that scientists are completely confident that no asteroids larger than 1km will strike our planet within the next century – the maximum period we can see map out their movements for due to the unpredictability of dynamic systems.
What’s also good is that even among much smaller asteroids, ones larger than just 140 metres, there are no known objects that have a significant chance of striking Earth within the next 100 years too.
The bad news is that only 40% of these asteroids have been found, and the worse news is that asteroids can be much smaller than 140m and still cause significant damage to regions or cities.
Humanity’s ability to detect asteroids before they impact the planet is still in its infancy, in part because of limits set by the laws of physics – our ability to survey asteroids in the dark of space in our solar system depends on them reflecting light towards us, and that depends on direction of their approach relative to the sun and the phase of the moon.
There have been more than 1,200 impacts of asteroids larger than a metre in size since 1998 and of those impacts humanity has only predicted five in advance – 0.42% – and even those predictions came with just hours to spare.
This timeline offers much less wriggle-room than the five years between the DART mission getting approval at NASA and its scheduled rendezvous with Dimorphos next year.
Never mind deflecting an asteroid off-course, hours wouldn’t even offer enough time to evacuate a town.
But astronomers hope and expect that new technologies and monitoring systems will improve our ability to make these predictions in the future – giving us more time – and the DART mission is just the first step in us proving that there is something we can do about it when we know something is coming.
This video grab from YouTube footage shows the meteor streaking across the sky in the Chelyabinsk
What damage can impact events cause?
Impact events are believed to have radically reshaped our planet throughout history, from the formation of the moon through to several enormous extinction events.
The Chicxulub crater is believed to have been caused by a large asteroid approximately 10km in diameter striking the Earth just over 66 million years ago, leading a very sudden mass extinction of an estimated 75% of all animal and plant life on the planet – including the dinosaurs.
A similar scale impact is not expected for the next 100 years at least, but significant damage could be caused by smaller asteroids.
Back in 2013, a meteor exploded in the atmosphere near Chelyabinsk in Russia, causing an enormous fireball, shattering windows, and leading to potentially more than a thousand people to seek medical treatment for their indirect injuries.
The SpaceX Falcon 9 rocket with the Double Asteroid Redirection Test (DART) spacecraft onboard ahead of launch. Pic: NASA/AP
That asteroid is believed to have been roughly 20 metres in size and was completely undetected before it entered the atmosphere, in part because it approached Earth from the direction of the sun – meaning it reflected no light to telescopes on Earth revealing its approach.
When it burned up in the atmosphere and exploded it briefly outshone the sun and the heat from the blast inflicted severe burns on observers below, as well as smashing windows and rattling buildings.
According to Johns Hopkins Applied Physics Laboratory, the Chelyabinsk meteor created “an airburst and shockwave that struck six cities across the country - and [sent] a stark reminder that dangerous objects can enter Earth’s atmosphere at any time”.
“Astronomers estimate there are tens of thousands of near-Earth asteroids close to 500ft (150m) wide and larger, big enough to cause regional devastation if they actually hit Earth.
“The Chelyabinsk object was just about 60ft (18m) wide, demonstrating that even small asteroids can be of concern - and making real-world tests of space-based planetary defence systems all the more important,” the university added.
US warships in the region, the green light for covert operations, and deadly strikes on what the Trump administration claims are “narco terrorists” – could America’s next move be to strike Venezuela?
President Donald Trump has accused President Nicolas Maduro of leading an organised crime gang (without providing evidence) and declined to answer when questioned if the CIA has the authority to assassinate him.
In return, the Venezuelan leader has accused Mr Trump of seeking regime change and of “fabricating a new eternal war” against his country, as he appealed to the American people for peace.
The rhetoric coming out of the White House, coupled with the presence of military ships in the region, has raised questions about a possible armed conflict between the US and Venezuela.
The question in the air is: Will the US actually attack Venezuela?
The USS Gravely destroyer arrives in Port-of-Spain, Trinidad and Tobago, on 26 October. Pic: AP
What are US warships doing?
The docking of the USS Gravely guided missile destroyer in the capital of Trinidad and Tobago – just 25 miles from the coast of Venezuela – is the latest incident to escalate tensions.
Venezuela’s government condemned the arrival and called it a provocation by Trinidad and Tobago and the US.
The USS Gerald R Ford aircraft carrier – the largest warship in the world – is also moving closer to Venezuela.
Satellite image shows USS Gerald R Ford on 25 October off the coast of Croatia, a day after the announcement it would be deployed to the Caribbean. Pic: EU Copernicus
It comes as the US has acknowledged carrying out at least seven strikes since September on vessels near Venezuela that it claims were transporting drugs, killing at least 32 people.
Venezuela’s government says the strikes are illegal, amount to murder, and are acts of aggression.
Earlier this month, Trump confirmed he has authorised the CIA to carry out covert operations – including lethal operations – in Venezuela.
The CIA has a long history of operations in Latin America, with actions varying widely from direct paramilitary engagement to intelligence gathering and support roles with little to no physical footprint.
What could happen?
To get an idea of what could happen next, Sky News spoke to Dr Carlos Solar, an expert on Latin American security at the RUSI defence thinktank.
He says the level of military strategy the US is applying around Venezuela seems “unproportionate” for the task of tackling drug trafficking.
In Venezuela, the government has civilians trained in the use of weapons to defend the country in the event of a US attack. Pic: AP
“A build-up this size can only suggest there’s a strategic military goal,” he added.
Dr Solar says the role of the CIA is “not surprising”, as the US often deploys spying capabilities in countries deemed adversarial.
“With the chances of a military conflict looming, having the most intelligence capable on the ground would be reasonable.”
The world’s largest warship, the USS Gerald R Ford, has been tasked to the Caribbean. File pic: Reuters
Asked what could happen next, Dr Solar told Sky News: “One scenario is Trump authorises a round of long-range precision attacks in Venezuela’s territory linked to drug trafficking operations, eventually forcing Maduro to reciprocate later.
“We saw this early in the year when the US attacked Iran’s nuclear facilitates and Tehran returned missiles to US bases in Qatar.
“If the US decides to move more strongly, destroying all critical military targets from the Venezuelan forces, then the US could have Maduro surrender and leave the country immediately.
“This would be the least disruptive without causing greater destabilisation of the country.”
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Venezuelan President: ‘We don’t want a war’
What does Trump say about Venezuela?
Trump said his reasons for the strikes on vessels were the migration of Venezuelans, allegedly including former prisoners, to the US – and drug trafficking.
“I authorised for two reasons really,” he said. “Number one, they have emptied their prisons into the United States of America…they came in through the border. They came in because we had an open border,” he told reporters. “And the other thing are drugs.”
He has accused Venezuela of trafficking huge amounts of cocaine into the US, and alleged Mr Maduro is the leader of the Tren de Aragua gang – a claim most of his own intelligence agencies do not support.
President Donald Trump is currently on a tour of Asia. Pic: Reuters
The US leader has not provided evidence for the claim about prisoners, and Sky News chief correspondent Stuart Ramsay pointed out the fentanyl drug that is causing destruction in America is largely manufactured in Mexico, not Venezuela.
“We are looking at land now, because we’ve got the sea very well under control,” Mr Trump added. It is not clear what actions this could entail.
The Pentagon recently disclosed to US Congress that the president has determined the US is engaged in “a non-international armed conflict” with drug cartels.
When asked if the CIA has the authority to execute Maduro, which would be a massive intervention, Trump declined to answer. Instead, he said: “I think Venezuela is feeling heat.”
Read more:
Venezuela opposition leader wins Nobel Peace Prize
Trump may have another motive in escalation of war on drugs
Venezuela’s President Nicolas Maduro. Pic: Reuters
What does Venezuela’s leader say?
Maduro has been in power since 2013, including re-elections in contests marred by accusations of fraud.
The last decade has seen his country gripped by spiralling hyperinflation and a humanitarian crisis that has seen an estimated eight million Venezuelans flee the country.
As the USS Gerald R Ford aircraft carrier moved closer to Venezuela, Maduro accused the US government of “fabricating a new eternal war” against his country.
Venezuelan ambassador to the UN, Samuel Moncada, holds a newspaper article about a recent US military strike. Pic: Reuters
“They promised they would never again get involved in a war, and they are fabricating a war that we will avoid,” he said in a national address.
“They are fabricating an extravagant narrative, a vulgar, criminal and totally fake one,” he added, perhaps a reference to Trump’s claim that he is the leader of the Tren de Aragua gang and that his country trafficks cocaine into the US.
“Venezuela is a country that does not produce cocaine leaves.”
Members of Venezuela’s Bolivarian National Guard. Pic: Reuters
Tren de Aragua, which traces its roots to a Venezuelan prison, is not known for having a big role in global drug trafficking but instead for its involvement in contract killings, extortion, and people smuggling.
Venezuela has raised a complaint to the UN Security Council and demanded accountability from the US.
Donald Trump has announced he will be raising tariffs on imports of Canadian goods by an extra 10% because of an anti-tariff advert aired in Ontario.
The advert used the words of former US president Ronald Reagan to criticise US tariffs.
A furious Mr Trump on Friday cancelled “all trade negotiations” with Canada.
Doug Ford, Ontario’s premier, said he would pull the advert from Monday, but it continued to run over the weekend, including during the first World Series game between the Toronto Blue Jays and Los Angeles Dodgers.
Mr Trump wrote in a post on his Truth Social platform: “Their Advertisement was to be taken down, IMMEDIATELY, but they let it run last night during the World Series, knowing that it was a FRAUD.
“Because of their serious misrepresentation of the facts, and hostile act, I am increasing the Tariff on Canada by 10% over and above what they are paying now.”
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TV advert deepens trade rift between Trump and Canada
Mr Trump claimed the advert misrepresented the position of Mr Reagan, a two-term president and a beloved figure in the Republican Party.
Mr Reagan had used much of his 1987 address, featured in Ontario’s ad, spelling out the case against tariffs.
Mr Trump said the advert was intended to influence the US Supreme Court ahead of arguments scheduled for next month which could decide whether the president has the power to impose his sweeping tariffs.
It was not immediately clear when the 10% hike would come into effect, or whether it would apply to all Canadian goods.
Canada – which is America’s closest ally, and one of their biggest trading partners – has been hit hard by US tariffs, and Canadian Prime Minister Mark Carney has been trying to work with Mr Trump to lower them.
Mark Carney and Donald Trump. File pic: Reuters
More than three-quarters of Canadian exports go to the US, and nearly 3.6bn Canadian dollars (2.7bn US dollars) worth of goods and services cross the border daily.
Many Canadian products have been hit with a 35% tariff, while steel and aluminium face rates of 50%.
Energy products have a lower rate of 10%, while other goods covered by the US-Canada-Mexico Agreement are exempt. That trade agreement is slated for review.
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Mr Trump negotiated the deal in his first term but has since soured on it.
The US president and Mr Carney will both attend the ASEAN summit in Malaysia which started on Sunday, but Mr Trump has said he has no intention of meeting Mr Carney there.
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