Astronomers have made the most detailed map ever of mysterious dark matter using the universe’s very first light, and the “groundbreaking” image has possibly proved Einstein right yet again.
The new image, made using 14 billion-year-old light from the turbulent aftermath of the Big Bang, shows the enormous matter tendrils that formed not long after the universe exploded into being. It turns out the shapes of these tendrils are remarkably similar to those predicted using Einstein’s theory of general relativity.
The new result contradicts previous dark matter maps that suggested the cosmic web — the gigantic network of crisscrossing celestial superhighways paved with hydrogen gas and dark matter that spans the universe — is less clumpy than Einstein’s theory predicted. The astronomers presented their findings April 11 at the Future Science with CMB x LSS conference at Japan’s Yukawa Institute for Theoretical Physics.
Related: 10 discoveries that prove Einstein was right about the universe — and 1 that proves him wrong
“We’ve made a new mass map using distortions of light left over from the Big Bang,” Mathew Madhavacheril (opens in new tab) , a cosmologist at the University of Pennsylvania, said in a statement (opens in new tab) . “Remarkably, it provides measurements that show that both the ‘lumpiness’ of the universe, and the rate at which it is growing after 14 billion years of evolution, are just what you’d expect from our standard model of cosmology based on Einstein’s theory of gravity.”
The Atacama Cosmology Telescope, located in Chile’s Atacama Desert. (Image credit: Debra Kellner)
Scientists think that the universe that formed after the Big Bang teemed with matter as well as antimatter particles, which are identical to their matter counterparts but with opposite electrical charges.
Because matter and antimatter annihilate each other when they collide, if both were made in equal measure, all of the universe’s matter should have been annihilated. However, the rapidly expanding fabric of space-time, along with some helpful quantum fluctuations, kept pockets of the universe’s primordial plasma intact.
Then, according to the rules set out by Einstein’s theory of relativity, gravity compressed and heated these plasma pockets so that sound waves — called baryon acoustic oscillations — rippled outward from the clumps at half the speed of light. These gigantic waves pushed out matter that hadn’t already been sucked in on itself, creating the infant cosmic web: a series of thin films surrounding countless cosmic voids, like a nest of soap bubbles in a sink.
Once this matter cooled, it coalesced into the first stars, which pooled into matter-rich galaxies at the meeting points of the web’s tangled strands.
But in the past, astronomers studying the cosmic web found what seemed to be a massive discrepancy — the matter was significantly more evenly distributed and less lumpy than expected. It was an ominous sign that existing cosmological models were missing important physics.RELATED STORIES—Gargantuan chunk of ‘cosmic web’ discovered. It’s 50 million light-years long.
—How much of the universe is dark matter?
—Shredded ‘stellar streams’ could lead to the Milky Way’s missing dark matter
To dig into this apparent discrepancy, the researchers turned to the U.S. National Science Foundation’s (NSF) Atacama Cosmology Telescope (ACT) in Chile, which scanned a quarter of the entire night sky from 2007 to 2022. Using its incredibly sensitive microwave detector, the telescope picked up light from the cosmic microwave background radiation (CMB) — the universe’s very first light made just 380,000 years after the Big Bang — and used a process called gravitational lensing to map the concentrations of matter in the CMB.
Gravitational lensing is a phenomenon in which light moving through a region of space-time warped by powerful gravitational fields travels, in a curve — warping and twisting through a gigantic funhouse mirror until it emerges as a stretched-out arc called an Einstein ring. Gravitational lensing can detect dark matter, which makes up 85% of the universe’s matter but cannot be directly observed.
The new map contradicted previous ones made with visible light from galaxies, and showed that Einstein’s original theory was far more accurate than first thought.
What this means for our overall view of the cosmos’ early evolution is still too early to say, but the researchers suggest that additional maps made using the ACT’s data and fresh observations from the Simons Observatory — an under-construction Atacama Desert telescope that can scan the sky 10 times as fast as ACT — could finally resolve the perplexing cosmic mystery.
The health secretary has said that the cabinet is aware of the “pressure” on Chancellor Rachel Reeves amid volatile markets and a challenging broader economic picture – but appealed for the public to “give her time”.
Wes Streeting argued that the public “underestimates” the “amount of heavy-lifting” Ms Reeves has had to do and will have to continue to do, as he declared “total confidence” in her leadership in a staunch defence of her handling of the economy.
Separately, international development minister Anneliese Dodds, who attends cabinet, told Sky News that Ms Reeves has been “very clear about the long-term plan for our country” and she herself is “confident in that long-term plan”.
The comments from the two key ministers come after the past week saw a drop in the pound and an increase in government borrowing costs, which has fuelled speculation of more spending cuts or tax rises.
Streeting has ‘total confidence in chancellor’s leadership’
Speaking at the Jewish Labour Movement’s annual conference in north London, the health secretary acknowledged the fierce competition among all government departments for any available public funding from the Treasury, and told party members that all ministers “have to make choices and trade-offs” in where funding goes.
Mr Streeting went on to say that the chancellor and her deputy, Darren Jones, have “the hardest job of all because they have to make those choices across every bit of government spending, and they have to think about what’s in the interests of our overall economy and how we get businesses growing”.
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Chancellor’s ‘pragmatic’ approach to China
He said: “I think people continue to underestimate both the amount of heavy lifting she has had to do in her first six months, and the amount of heavy lifting she will have to do in her next six months.
“And the cabinet doesn’t underestimate that – we understand the choices she has to make, the pressure she is under.”
As a result, cabinet ministers all “have a responsibility” to both “make tough choices and drive reform and value for money” within their departments, and also be “drivers of economic growth”.
“Nothing in the last six months has shaken my conviction that economic growth is the number one priority,” he said.
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Keep up with all the latest news from the UK and around the world by following Sky News
Continuing his defence of the chancellor’s handling of the economy so far, Mr Streeting said she is “trying to break us out of what has been the status quo and the economic orthodoxy of more than a decade”.
“People need to give her time, and they need to not forget that, without [Sir Keir Starmer’s] leadership, certainly we wouldn’t have won the last general election.
“Without Rachel’s leadership, we wouldn’t have won the last general election either. She built Labour’s economic credibility out of the ashes they were left in after the Corbyn leadership. And she has built that trust, built up that plan, and now she’s following through.”
He declared that he has “total confidence in the leadership that Rachel’s providing, and the leadership that the cabinet is following and driving with her, because all of us have to deliver economic growth for our country”.
Minister ‘confident in chancellor’s long-term plan’
Speaking in a separate session at the conference, Ms Dodds noted “speculation” about the fiscal headroom (the amount of money the chancellor will have available to spend), but said: “We have to focus on actually the evidence.
“And when we look at the evidence, we can see that the UK government has a chancellor who is very clear about the long-term plan for our country. She’s been delivering on it.”
Ms Dodds, who also attends cabinet, pointed to a “new fiscal system”, the chancellor’s new Industrial Strategy Council, as well as “record levels of investment under Rachel Reeves’s leadership”.
“I think it’s really important for us to focus on those fundamentals, on what has been achieved in a very short space of time. And I’m confident in that long-term plan that Rachel has been setting out.
“And we can already see the benefit of that, frankly, in terms of the UK’s reputation when it comes to public finances, but economic management more generally. Certainly that’s what I’ve heard internationally and keep hearing just now.”
Chancellor accused of having ‘fled to China’
The pair were speaking as the chancellor holds meetings in China in a bid to drum up investment for the UK economy, having ignored calls to cancel the long-planned trip because of economic turmoil at home.
Opposition parties have accused the chancellor of having “fled to China” rather than explain how she will fix the UK’s flatlining economy, and former prime minister Boris Johnson said Ms Reeves had “been rumbled” and said she should “make her way to HR and collect her P45 – or stay in China”.
Speaking during her trip, Ms Reeves said she would not alter her economic plans, with the October budget designed to return the UK to economic stability, and reiterated that “growth is the number one mission of this government”.
She said that “action” will be taken to meet the fiscal rules. That action is reported to include deeper spending cuts than the 5% efficiency savings already expected to be announced later this year, while cuts to the welfare bill are also said to be under consideration.
The health secretary has said that the cabinet is aware of the “pressure” on Chancellor Rachel Reeves amid volatile markets and a challenging broader economic picture – but appealed for the public to “give her time”.
Wes Streeting argued that the public “underestimates” the “amount of heavy-lifting” Ms Reeves has had to do and will have to continue to do, as he declared “total confidence” in her leadership in a staunch defence of her handling of the economy.
Separately, international development minister Anneliese Dodds, who attends cabinet, told Sky News that Ms Reeves has been “very clear about the long-term plan for our country” and she herself is “confident in that long-term plan”.
The comments from the two key ministers come after the past week saw a drop in the pound and an increase in government borrowing costs, which has fuelled speculation of more spending cuts or tax rises.
Streeting has ‘total confidence in chancellor’s leadership’
Speaking at the Jewish Labour Movement’s annual conference in north London, the health secretary acknowledged the fierce competition among all government departments for any available public funding from the Treasury, and told party members that all ministers “have to make choices and trade-offs” in where funding goes.
Mr Streeting went on to say that the chancellor and her deputy, Darren Jones, have “the hardest job of all because they have to make those choices across every bit of government spending, and they have to think about what’s in the interests of our overall economy and how we get businesses growing”.
Please use Chrome browser for a more accessible video player
1:14
Chancellor’s ‘pragmatic’ approach to China
He said: “I think people continue to underestimate both the amount of heavy lifting she has had to do in her first six months, and the amount of heavy lifting she will have to do in her next six months.
“And the cabinet doesn’t underestimate that – we understand the choices she has to make, the pressure she is under.”
As a result, cabinet ministers all “have a responsibility” to both “make tough choices and drive reform and value for money” within their departments, and also be “drivers of economic growth”.
“Nothing in the last six months has shaken my conviction that economic growth is the number one priority,” he said.
Follow Sky News on WhatsApp
Keep up with all the latest news from the UK and around the world by following Sky News
Continuing his defence of the chancellor’s handling of the economy so far, Mr Streeting said she is “trying to break us out of what has been the status quo and the economic orthodoxy of more than a decade”.
“People need to give her time, and they need to not forget that, without [Sir Keir Starmer’s] leadership, certainly we wouldn’t have won the last general election.
“Without Rachel’s leadership, we wouldn’t have won the last general election either. She built Labour’s economic credibility out of the ashes they were left in after the Corbyn leadership. And she has built that trust, built up that plan, and now she’s following through.”
He declared that he has “total confidence in the leadership that Rachel’s providing, and the leadership that the cabinet is following and driving with her, because all of us have to deliver economic growth for our country”.
Minister ‘confident in chancellor’s long-term plan’
Speaking in a separate session at the conference, Ms Dodds noted “speculation” about the fiscal headroom (the amount of money the chancellor will have available to spend), but said: “We have to focus on actually the evidence.
“And when we look at the evidence, we can see that the UK government has a chancellor who is very clear about the long-term plan for our country. She’s been delivering on it.”
Ms Dodds, who also attends cabinet, pointed to a “new fiscal system”, the chancellor’s new Industrial Strategy Council, as well as “record levels of investment under Rachel Reeves’s leadership”.
“I think it’s really important for us to focus on those fundamentals, on what has been achieved in a very short space of time. And I’m confident in that long-term plan that Rachel has been setting out.
“And we can already see the benefit of that, frankly, in terms of the UK’s reputation when it comes to public finances, but economic management more generally. Certainly that’s what I’ve heard internationally and keep hearing just now.”
Chancellor accused of having ‘fled to China’
The pair were speaking as the chancellor holds meetings in China in a bid to drum up investment for the UK economy, having ignored calls to cancel the long-planned trip because of economic turmoil at home.
Opposition parties have accused the chancellor of having “fled to China” rather than explain how she will fix the UK’s flatlining economy, and former prime minister Boris Johnson said Ms Reeves had “been rumbled” and said she should “make her way to HR and collect her P45 – or stay in China”.
Speaking during her trip, Ms Reeves said she would not alter her economic plans, with the October budget designed to return the UK to economic stability, and reiterated that “growth is the number one mission of this government”.
She said that “action” will be taken to meet the fiscal rules. That action is reported to include deeper spending cuts than the 5% efficiency savings already expected to be announced later this year, while cuts to the welfare bill are also said to be under consideration.
Anti-corruption minister Tulip Siddiq could lose her job if the investigation into her properties finds she broke government rules, a cabinet member has suggested.
She has referred herself to the prime minister’s independent adviser on ministers’ interests, Sir Laurie Magnus, following reports she lived in properties in London linked to allies of her aunt, Sheikh Hasina, the deposed prime minister of Bangladesh.
There have also been questions about trips she took to Russia alongside her aunt.
Ms Siddiq insists she has “done nothing wrong”.
As economic secretary to the Treasury, Ms Siddiq oversees anti-corruption efforts in the financial sector as part of her brief.
Mr Kyle told Sky News: “With Tulip, she’s referred herself straight away to this.
“There is a process under way and we know full well it will be a functional process, and the outcomes of it will be stuck to by the prime minister and this government, a complete contrast to what we’ve had in the past.”
He gave this answer after Trevor pointed out Labour would have been calling for a sacking if the roles were reversed and the Tories were in power.
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2:02
‘Tulip Siddiq will lose job if she broke rules’
Mr Kyle contrasted his party’s stance with the Conservative one – saying he called for an investigation into allegations of bullying from Priti Patel, and she “had to be dragged to that inquiry”.
He added that he let the inquiry pan out.
“The results came out, she was found guilty, and no action happened,” Mr Kyle said.
His response came after Conservative leader Kemi Badenoch called for Ms Siddiq to be sacked yesterday.
Shadow chancellor Mel Stride repeated the calls today to Sky News.
He said: “What is not right is that the prime minister is not moving her out of that position and getting her to step down
“Because she is the anti-corruption minister, she has serious charges laid against her now, or serious accusations around corruption, and it’s going to be really impossible for her to do that job under current circumstances.
“So she should step down, and the prime minister needs to get a grip of that.”
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