A NASA mission is due to land in the US with “pristine” samples from an asteroid which scientists warned could one day hit Earth.
The OSIRIS-REx spacecraft gathered rocks and dust from the Bennu asteroid’s surface in 2020.
The spacecraft was launched in 2016 as part of NASA’s first mission to collect samples from an asteroid.
It will land with the sample in the Utah desert on Sunday.
NASA has said the “pristine material from Bennu” will offer generations of scientists a window into the time when the sun and planets were forming about 4.5 billion years ago.
Bennu, which was discovered by NASA in 1999, is thought to have been around within the first 10 million years of our solar system’s formation.
It has a diameter of around 490m (1,600ft), weighs 85.5 million tonnes, and is covered in boulders of rock.
The OSIRIS-REx spacecraft briefly touched the surface of Bennu and collected a sample before propelling off the asteroid in October 2020.
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April: Arab astronaut makes history in space
Could Bennu ever hit Earth?
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Bennu passes near Earth every six years and has had three close encounters with the planet in 1999, 2005, and 2011, NASA has said.
In 2021, scientists with the OSIRIS-REx team said the asteroid could possibly drift into the Earth’s orbit and hit the planet by September 2182.
Image: A mosaic of Bennu created using observations made by NASA’s OSIRIS-REx spacecraft. Pic: NASA/Goddard/University of Arizona
There is a 1 in 2,700, or 0.037% chance that Bennu could hit Earth in that year, scientists said.
The asteroid would release 1,200 megatons of energy, around 24 times the energy of the most powerful nuclear weapon ever built, if it hit the Earth, according to IFLScience.
However, this is substantially less than the six-mile wide asteroid which killed the dinosaurs – which scientists said in 2019 was as powerful as 10 billion atomic bombs.
White House press secretary Karoline Leavitt has said Donald Trump will make a decision on whether to militarily strike Iran in the next two weeks. That’s as diplomatic talks between Western governments and the Iranians ramp up.
In today’s episode, US correspondents Mark Stone and Martha Kelner unpick why the delay might be, and the competing voices in the ears of the president.
If you’ve got a question you’d like the Trump100 team to answer, you can email it to trump100@sky.uk.
Don’t forget, you can also watch all episodes on our YouTube channel.
This is the most significant statement from the US president in days, though it still keeps everyone guessing.
In a message conveyed through his press secretary, he is giving diplomacy up to two weeks to work.
“Based on the fact that there’s a substantial chance of negotiations that may or may not take place with Iran in the near future, I will make my decision whether or not to go within the next two weeks,” Karoline Leavitt quoted him as saying.
It is not clear what “whether or not to go” entails.
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0:40
Trump: Iran ‘weeks away’ from nuclear weapon
We know that he has been given a spectrum of different military options by his generals and we know that the Israelis are pressuring him to use American B2 bombers with their bunker-busting bombs to destroy Iran’s nuclear facility at Fodow.
The Israelis are encouraging no delay. But against that, he is weighing up many risks, both military and political.
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Militarily, it is not clear how successful a bunker-busting strike on Fordow would be.
Experts have suggested it would require several of the massive bombs, which have never been used in combat before, to be dropped on the site.
It is not as simple as one clean strike and job done.
Politically, the president is under significant pressure domestically not to get involved in Iran.
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2:40
MAGA civil war breaks out over Iran
Within his own MAGA coalition – influencers, politicians and media personalities are lining up in criticism of involvement in the conflict.
One of those leading the criticism, his former chief strategist Steve Bannon, who maintains huge influence, was seen entering the White House on Thursday.
His press secretary reiterated to us that the president always wants to give diplomacy a chance and she confirmed that his Middle East envoy Steve Witkoff has spoken to the Iranian foreign minister Abbas Araghchi.
Image: Steve Bannon, seen recently at a conservative event in Maryland, is against US involvement in Iran. Pic: AP
European leaders, including the UK foreign secretary David Lammy, who is in Washington, are meeting Mr Araghchi in Geneva on Friday.
The two-week window – assuming it lasts that long – also gives space to better prepare for any strike and mitigate against some of the other risks of US involvement.
There are 40,000 troops in bases across the Middle East. It takes time to increase security at these bases or to move non-essential personnel out. It also takes time to move strategic military assets into the region.
The USS Nimitz aircraft carrier and its support vessels were redeployed from the Indo-Pacific on Monday. Their last known position was the Strait of Malacca two days ago.
The Nimitz Carrier Group will overlap with the USS Carl Vinson group which was deployed to the Middle East in March.
The potential two-week window also allows for more time for a ‘day after’ plan, given that the Israeli strategy appears to be regime change from within.
Since the Israeli action in Iran began last week, the worst-case scenario of mass casualties in Israel from Iranian attacks has not materialised.
The president is said to be surprised and encouraged by this. “Israel has exceeded a lot of people’s expectations in their abilities,” press secretary Karoline Leavitt said.
The Israeli success, the absence of a mass casualty event in Israel, and the lack of any sustained counterattack by Iranian proxies in the region remove reservations that previous presidents have had about taking on Iran.
That said, sources have told Sky News that the president is determined that the diplomatic solution should be given a chance despite current pessimism over the chances of success.
A SpaceX rocket has exploded before launch – sending a dramatic fireball high into the sky.
Starship 36 was preparing for its 10th test flight at Starbase – SpaceX’slaunch site at the southern tip of Texas – when the incident occurred on Wednesday evening.
During take off procedures just after 11pm local time, the rocket exploded into a giant fireball.
The company described the incident as a “major anomaly”.
Image: Starship 36 was preparing for its 10th test flight. Pic: NASASpaceFlight
Image: The test flight failed at Starbase – SpaceX’s launch site. Pic: NASASpaceFlight
In a statement, it added: “A safety clear area around the site was maintained throughout the operation and all personnel are safe and accounted for.
“Our Starbase team is actively working to safe the test site and the immediate surrounding area in conjunction with local officials.
“There are no hazards to residents in surrounding communities, and we ask that individuals do not attempt to approach the area while safing operations continue.”
It marks the latest failure for the space flight company, which hopes that Starship will one day be used to ferry people and cargo to Mars.
Last month, a Starship test flight began spinning out of control about 30 minutes after its launch because of fuel leaks – meaning it broke up on re-entry into the Earth’s atmosphere.
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May: SpaceX rocket spins out of control
That followed explosive past failures in January, where a rocket blew up about eight minutes after take-off, and March, which forced flights in Florida to be temporarily grounded.
SpaceX CEO Elon Musk said in May that despite the rocket failure, the test flight was a “big improvement”.
A day later, he said he wants to send a spacecraft crewed by humanoid robots on a voyage to Mars by the end of 2026.