IceCube Neutrino Observatory sits beneath a green aurora in the icy Antarctic (Image credit: IceCube/ NSF)
Scientists have traced the galactic origins of thousands of “ghost particles” known as neutrinos to create the first-ever portrait of the Milky Way made from matter and not light — and it’s given them a brand-new way to study the universe.
The groundbreaking image was snapped by capturing the neutrinos as they fell through the IceCube Neutrino Observatory, a gigantic detector buried deep inside the South Pole’s ice.
Neutrinos earn their spooky nickname because their nonexistent electrical charge and almost-zero mass mean they barely interact with other types of matter. As such, neutrinos fly straight through regular matter at close to the speed of light.
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Yet by slowing these neutrinos, physicists have finally traced the particles’ origins billions of light-years away to ancient, cataclysmic stellar explosions and cosmic-ray collisions. The researchers published their findings June 29 in the journal Science.
“The capabilities provided by the highly sensitive IceCube detector, coupled with new data analysis tools, have given us an entirely new view of our galaxy — one that had only been hinted at before,” Denise Caldwell, director of the National Science Foundation’s physics division, which funded the research, said in a statement. “As these capabilities continue to be refined, we can look forward to watching this picture emerge with ever-increasing resolution, potentially revealing hidden features of our galaxy never before seen by humanity.”
Two images of the Milky Way galaxy. The top was made with visible light and the bottom with neutrinos. (Image credit: IceCube Collaboration/U.S. National Science Foundation (Lily Le & Shawn Johnson)/ESO (S. Brunier)) How to catch a ghost particle
Every second, about 100 billion neutrinos pass through each square centimeter of your body. The tiny particles are everywhere — produced in the nuclear fire of stars, in enormous supernova explosions, by cosmic rays and radioactive decay, and in particle accelerators and nuclear reactors on Earth. In fact, neutrinos, which were first discovered zipping out of a nuclear reactor in 1956, are second only to photons as the most abundant subatomic particles in the universe.
Despite their ubiquity, the chargeless and near-massless particles’ minimal interactions with other matter make neutrinos incredibly difficult to detect. Many famous neutrino-detection experiments have spotted the steady bombardment of neutrinos sent to us from the sun, but this cascade also masks neutrinos from more unusual sources, such as gigantic star explosions called supernovas and particle showers produced by cosmic rays.
To capture the neutrinos, particle physicists turned to IceCube, located at the Amundsen-Scott South Pole Station in Antarctica. The gigantic detector consists of more than 5,000 optical sensors beaded across 86 strings that dangle into holes drilled up to 1.56 miles (2.5 kilometers) into the Antarctic ice.
The view down one of IceCube’s 86 detector strings, which dangle in holes drilled up to 1.56 miles into the ice. (Image credit: NSF/B. Gudbjartsson.)
While many neutrinos pass completely unimpeded through the Earth, they do occasionally interact with water molecules, creating particle byproducts called muons that can be witnessed as flashes of light inside the detector’s sensors. From the patterns these flashes make, scientists can reconstruct the energy, and sometimes the sources, of the neutrinos.
Finding a neutrino’s starting point depends on how clear its direction is recorded in the detector; some have very obvious initial directions, whereas others produce cascading “fuzz balls of light” that obscure their origins, lead author Naoko Kurahashi Neilson, a physicist at Drexel University in Philadelphia, said in the statement.RELATED STORIES—Astronomers propose making a neutrino detector out of the Pacific Ocean
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By feeding more than 60,000 detected neutrino cascades collected over 10 years into a machine-learning algorithm, the physicists built up a stunning picture: an ethereal, blue-tinged image showing the neutrinos’ sources all across our galaxy.
The map showed that the neutrinos were being overwhelmingly produced in regions with previously detected high gamma-ray counts, confirming past suspicions that many ghost particles are summoned as byproducts of cosmic rays smashing into interstellar gas. It also left the physicists awestruck.
“I remember saying, ‘At this point in human history, we’re the first ones to see our galaxy in anything other than light,'” Neilson said.
Just like previous revolutionary advances such as radio astronomy, infrared astronomy and gravitational wave detection, neutrino mapping has given us a completely new way to peer out into the universe. Now, it’s time to see what we find.
Rachel Reeves has hinted that taxes are likely to be raised this autumn after a major U-turn on the government’s controversial welfare bill.
Sir Keir Starmer’s Universal Credit and Personal Independent Payment Bill passed through the House of Commons on Tuesday after multiple concessions and threats of a major rebellion.
MPs ended up voting for only one part of the plan: a cut to universal credit (UC) sickness benefits for new claimants from £97 a week to £50 from 2026/7.
Initially aimed at saving £5.5bn, it now leaves the government with an estimated £5.5bn black hole – close to breaching Ms Reeves’s fiscal rules set out last year.
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6:36
Rachel Reeves’s fiscal dilemma
In an interview with The Guardian, the chancellor did not rule out tax rises later in the year, saying there were “costs” to watering down the welfare bill.
“I’m not going to [rule out tax rises], because it would be irresponsible for a chancellor to do that,” Ms Reeves told the outlet.
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“We took the decisions last year to draw a line under unfunded commitments and economic mismanagement.
“So we’ll never have to do something like that again. But there are costs to what happened.”
Meanwhile, The Times reported that, ahead of the Commons vote on the welfare bill, Ms Reeves told cabinet ministers the decision to offer concessions would mean taxes would have to be raised.
The outlet reported that the chancellor said the tax rises would be smaller than those announced in the 2024 budget, but that she is expected to have to raise tens of billions more.
Sir Keir did not explicitly say that she would, and Ms Badenoch interjected to say: “How awful for the chancellor that he couldn’t confirm that she would stay in place.”
In her first comments after the incident, Ms Reeves said she was having a “tough day” before adding: “People saw I was upset, but that was yesterday.
“Today’s a new day and I’m just cracking on with the job.”
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“In PMQs, it is bang, bang, bang,” he said. “That’s what it was yesterday.
“And therefore, I was probably the last to appreciate anything else going on in the chamber, and that’s just a straightforward human explanation, common sense explanation.”
Hamas has said it has “submitted its positive response” to the latest proposal for a ceasefire in Gaza to mediators.
The proposal for a 60-day ceasefire was presented by US President Donald Trump, who has been pushing hard for a deal to end the fighting in Gaza, with Israeli Prime Minister Benjamin Netanyahu set to visit the White House next week to discuss a deal.
Mr Trump said Israel had agreed to his proposed ceasefire terms, and he urged Hamas to accept the deal as well.
Hamas’ “positive” response to the proposal had slightly different wording on three issues around humanitarian aid, the status of the Israeli Defence Forces inside Gaza and the language around guarantees beyond the 60-day ceasefire, a source with knowledge of the negotiations revealed.
But the source told Sky News: “Things are looking good.”
Image: A woman cries after her son was killed while on his way to an aid distribution centre. Pic: AP/Jehad Alshrafi
Hamas said it is “fully prepared to immediately enter into a round of negotiations regarding the mechanism for implementing this framework” without elaborating on what needed to be worked out in the proposal’s implementation.
The US said during the ceasefire it would “work with all parties to end the war”.
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A Hamas official said on condition of anonymity that the truce could start as early as next week.
Image: An Israeli army tank advances in the Gaza Strip, as seen from southern Israel. Pic: AP/Leo Correa
But he added that talks were needed first to establish how many Palestinian prisoners would be released in return for each freed Israeli hostage and to specify the amount of humanitarian aid that will be allowed to enter Gaza during the ceasefire.
He said negotiations on a permanent ceasefire and the full withdrawal of Israeli troops from Gaza in return for the release of the remaining hostages would start on the first day of the truce.
Hamas has been seeking guarantees that the 60-day ceasefire would lead to a total end to the nearly 21-month-old war, which caused previous rounds of negotiations to fail as Mr Netanyahu has insisted that Israel would continue fighting in Gaza to ensure the destruction of Hamas.
The Hamas official said that Mr Trump has guaranteed that the ceasefire will extend beyond 60 days if necessary to reach a peace deal, but there is no confirmation from the US of such a guarantee.
Speaking to journalists on Air Force One, Mr Trump welcomed Hamas’s “positive spirit” to the proposal, adding that there could be a ceasefire deal by next week.
Image: Palestinians dispersing away from tear gas fired at an aid distribution site in Gaza. Pic: AP
Image: A girl mourns the loss of her father, who was killed while heading to an aid distribution hub. Pic: AP/Jehad Alshrafi
Hamas also said it wants more aid to flow through the United Nations and other humanitarian agencies, which comes as the UN human rights officer said it recorded 613 Palestinians killed in Gaza within a month while trying to obtain aid.
Most of them were said to have been killed while trying to reach food distribution points by the controversial US- and Israeli-backed Gaza Humanitarian Foundation (GHF).
The spokeswoman for the UN human rights office, Ravina Shamdasani, said the agency was not able to attribute responsibility for the killings, but added that “it is clear that the Israeli military has shelled and shot at Palestinians trying to reach the distribution points” operated by GHF.
Image: Palestinians carry aid packages near the GHF distribution centre in Khan Younis. Pic: AP/Abdel Kareem Hana
Ms Shamdasani said that of the total tallied, 509 killings were “GHF-related”, meaning at or near its distribution sites.
The GHF accused the UN of taking its casualty figures “directly from the Hamas-controlled Gaza health ministry” and of trying “to falsely smear our effort”, which echoed statements to Sky News by the executive director of GHF, Johnnie Moore.
Since that phone call, Dr Bahbah has been living temporarily in Qatar where he is in direct contact with officials from Hamas. He has emerged as an important back-channel American negotiator. But how?
An inauguration party
I first met Dr Bahbah in January. It was the eve of President Trump’s inauguration and a group of Arab-Americans had thrown a party at a swanky restaurant in Washington DC’s Wharf district.
There was a sense of excitement. Arab-Americans were crediting themselves for having helped Trump over the line in the key swing state of Michigan.
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Image: Dr Bahbah negotiating with Hamas for the release of Edan Alexander
Despite traditionally being aligned with the Democrats, Arab-Americans had abandoned Joe Biden in large numbers because of his handling of the Gaza war.
I’d reported from Michigan weeks earlier and been struck by the overwhelming support for Trump. The vibe essentially was ‘it can’t get any worse – we may as well give Trump a shot’.
Mingling among diplomats from Middle Eastern countries, wealthy business owners and even the president of FIFA, I was introduced to an unassuming man in his late 60s.
We got talking and shared stories of his birthplace and my adopted home for a few years – Jerusalem.
Image: Dr Bahbah and Trump
He told me that he still has the deed to his family’s 68 dunum (16 acre) Palestinian orchard.
With nostalgia, he explained how he still had his family’s UN food card which shows their allocated monthly rations from their time living in a refugee camp and in the Jerusalem’s old city.
Dr Bahnah left Jerusalem in 1976. He is now a US citizen but told me Jerusalem would always be home.
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1:58
Will Trump achieve a Gaza ceasefire?
He echoed the views I had heard in Michigan, where he had spent many months campaigning as the president of Arab-Americans for Trump.
He dismissed my scepticism that Trump would be any better than Biden for the Palestinians.
We exchanged numbers and agreed to meet for lunch a few weeks later.
A connection with Trump
Dr Bahbah invited two Arab-American friends to our lunch. Over burgers and coke, a block from the White House, we discussed their hopes for Gaza under Trump.
The three men repeated what I had heard on the campaign trail – that things couldn’t get any worse for the Palestinians than they were under Biden.
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2:54
Gaza deaths increase when aid sites open
Trump, they said, would use his pragmatism and transactional nature to create opportunities.
Dr Bahbah displayed to me his own initiative too. He revealed that he got a message to the Palestinian Authority President, Mahmoud Abbas, to suggest he ought to write a personal letter of congratulations to President Trump.
A letter from Ramallah was on the Oval Office desk on 6 November, a day after the election. It’s the sort of gesture Trump notices.
It was clear to me that the campaigning efforts and continued support of these three wealthy men had been recognised by the Trump administration.
They had become close to key figures in Trump’s team – connections that would, in time, pay off.
There were tensions along the way. When Trump announced he would “own Gaza”, Dr Bahbah was disillusioned.
“Arab-Americans for Trump firmly rejects President Donald J Trump’s suggestion to remove – voluntarily or forcibly – Palestinians in Gaza to Egypt and Jordan,” he said.
Image: Letter from Abbas to Trump. Pic: Bishara Bahbah
He then changed the name of his alliance, dropping Trump. It became Arab-Americans for Peace.
I wondered if the wheels were coming off this unlikely alliance.
Was he realising Trump couldn’t or wouldn’t solve the Palestinian issue? But Dr Bahbah maintained faith in the new president.
“I am worried, but at the same time, Trump might be testing the waters to determine what is acceptable…,” he told me in late February as the war dragged on.
“There is no alternative to the two-state solution.”
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He told me that he expected the president and his team to work on the rebuilding of Gaza and work to launch a process that would culminate in the establishment of a Palestinian state, side by side in peace with Israel.
It was, and remains, an expectation at odds with the Trump administration’s official policy.
The phone call
In late April, Dr Bahbah’s phone rang. The man at the other end of the line was Dr Ghazi Hamad, a senior member of Hamas.
Dr Bahbah and Dr Hamad had never met – they did not know each other.
But Hamas had identified Dr Bahbah as the Palestinian-American with the most influence in Trump’s administration.
Dr Hamad suggested that they could work together – to secure the release of all the hostages in return for a permanent ceasefire.
Hamas was already using the Qatari government as a conduit to the Americans but Dr Bahbah represented a second channel through which they hoped they could convince President Trump to increase pressure on Israel.
There is a thread of history which runs through this story. It was the widow of former Palestinian leader Yasser Arafat who passed Dr Bahbah’s number to Dr Hamad.
In the 1990s, Dr Bahbah was part of a Palestinian delegation to the multilateral peace talks.
He became close to Arafat but he had no experience of a negotiation as delicate and intractable as this.
The first step was to build trust. Dr Bahbah contacted Steve Witkoff, Trump’s Middle East envoy.
Witkoff and Bahbah had something in common – one a real-estate mogul, the other an academic, neither had any experience in diplomacy. It represented the perfect manifestation of Trump’s ‘outside the box’ methods.
But Witkoff was sceptical of Dr Bahbah’s proposal at first. Could he really have any success at securing agreement between Israel and Hamas? A gesture to build trust was necessary.
Bahbah claims he told his new Hamas contact that they needed to prove to the Trump administration that they were serious about negotiating.
Within weeks a remarkable moment more than convinced Dr Bahbah and Witkoff that this new Hamas back-channel could be vitally important.
We were told at the time that his release was a result of a direct deal between Hamas and the US.
Israel was not involved and the deal was described by Hamas as a “good faith” gesture. Dr Bahbah sees it as his deal.
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27:55
Doctors on the frontline
Direct talks took place between Dr Bahbah and five Hamas officials in Doha who would then convey messages back to at least 17 other Hamas leadership figures in both Gaza and Cairo.
Dr Bahbah in turn conveyed Hamas messages back to Witkoff who was not directly involved in the Hamas talks.
A Qatari source told me that Dr Bahbah was “very involved” in the negotiations.
But publicly, the White House has sought to downplay his role, with an official telling Axios in May that “he was involved but tangentially”.
The Israeli government was unaware of his involvement until their own spies discovered the backchannel discussion about the release of Alexander.
Since that April phone call, Dr Bahbah has remained in the Qatari capital, with trips to Cairo, trying to help secure a final agreement.
He is taking no payment from anyone for his work.
As he told me when we first met back in January: “If I can do something to help to end this war and secure a future for the Palestinian people, I will.”