An incredible collision of galaxies that sent shock waves across the universe has been captured by modern telescopes and given new insights into the explosion, scientists have said.
The 3.2 million kph collision was captured in stunning detail by some of the planet’s most powerful telescopes.
The impact sparked an immensely powerful shock similar to a sonic boom from a jet fighter on Earth – and has left striking phenomena now seen in the universe, researchers said.
The smash was observed in Stephan's Quintet, a group of five galaxies, findings published in the Monthly Notices of the Royal Astronomical Society journal show.
Dr Marina Arnaudova said: “Since its discovery in 1877, Stephan’s Quintet has captivated astronomers, because it represents a galactic crossroad where past collisions between galaxies have left behind a complex field of debris.
“Dynamical activity in this galaxy group has now been reawakened by a galaxy smashing through it at an incredible speed of over two million miles per hour, leading to an immensely powerful shock, much like a sonic boom from a jet fighter.”
Scientists led by the University of Hertfordshire captured the event using the new €20 million ($21m) William Herschel Telescope Enhanced Area Velocity Explorer (Weave).
They uncovered a dual nature behind the shock front, previously unknown to astronomers.
They found that as the shock moves through pockets of cold gas, it travels at hypersonic speeds, powerful enough to rip apart electrons from atoms, leaving behind a glowing trail of charged gas.
However, when the shock passes through the surrounding hot gas, it becomes much weaker, according to PhD student Soumyadeep Das, of the University of Hertfordshire.
He added: “Instead of causing significant disruption, the weak shock compresses the hot gas, resulting in radio waves that are picked up by radio telescopes like the Low Frequency Array.”
The insight and unprecedented detail came from Weave, combining data with other cutting-edge instruments, and the James Webb Space Telescope.
PFA Team of the Year: David de Gea, Kyle Walker, Jan Vertonghen, Nicolas Otamendi, Marcos Alonso, David Silva, Kevin De Bruyne, Christian Eriksen, Harry Kane, Mohamed Salah, Sergio Aguero
How to watch Ireland v Pakistan in UAE
When: The one-off Test starts on Friday, May 11
What time: Each day’s play is scheduled to start at 2pm UAE time.
TV: The match will be broadcast on OSN Sports Cricket HD. Subscribers to the channel can also stream the action live on OSN Play.
How it works
Each player begins with one of the great empires of history, from Julius Caesar's Rome to Ramses of Egypt, spread over Europe and the Middle East.
Round by round, the player expands their empire. The more land they have, the more money they can take from their coffers for each go.
As unruled land and soldiers are acquired, players must feed them. When a player comes up against land held by another army, they can choose to battle for supremacy.
A dice-based battle system is used and players can get the edge on their enemy with by deploying a renowned hero on the battlefield.
Players that lose battles and land will find their coffers dwindle and troops go hungry. The end goal? Global domination of course.
How to wear a kandura
Dos
- Wear the right fabric for the right season and occasion
- Always ask for the dress code if you don’t know
- Wear a white kandura, white ghutra / shemagh (headwear) and black shoes for work
- Wear 100 per cent cotton under the kandura as most fabrics are polyester
Don’ts
- Wear hamdania for work, always wear a ghutra and agal
- Buy a kandura only based on how it feels; ask questions about the fabric and understand what you are buying
Conflict, drought, famine
Estimates of the number of deaths caused by the famine range from 400,000 to 1 million, according to a document prepared for the UK House of Lords in 2024.
It has been claimed that the policies of the Ethiopian government, which took control after deposing Emperor Haile Selassie in a military-led revolution in 1974, contributed to the scale of the famine.
Dr Miriam Bradley, senior lecturer in humanitarian studies at the University of Manchester, has argued that, by the early 1980s, “several government policies combined to cause, rather than prevent, a famine which lasted from 1983 to 1985. Mengistu’s government imposed Stalinist-model agricultural policies involving forced collectivisation and villagisation [relocation of communities into planned villages].
The West became aware of the catastrophe through a series of BBC News reports by journalist Michael Buerk in October 1984 describing a “biblical famine” and containing graphic images of thousands of people, including children, facing starvation.
Band Aid
Bob Geldof, singer with the Irish rock group The Boomtown Rats, formed Band Aid in response to the horrific images shown in the news broadcasts.
With Midge Ure of the band Ultravox, he wrote the hit charity single Do They Know it’s Christmas in December 1984, featuring a string of high-profile musicians.
Following the single’s success, the idea to stage a rock concert evolved.
Live Aid was a series of simultaneous concerts that took place at Wembley Stadium in London, John F Kennedy Stadium in Philadelphia, the US, and at various other venues across the world.
The combined event was broadcast to an estimated worldwide audience of 1.5 billion.
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What are NFTs?
Are non-fungible tokens a currency, asset, or a licensing instrument? Arnab Das, global market strategist EMEA at Invesco, says they are mix of all of three.
You can buy, hold and use NFTs just like US dollars and Bitcoins. “They can appreciate in value and even produce cash flows.”
However, while money is fungible, NFTs are not. “One Bitcoin, dollar, euro or dirham is largely indistinguishable from the next. Nothing ties a dollar bill to a particular owner, for example. Nor does it tie you to to any goods, services or assets you bought with that currency. In contrast, NFTs confer specific ownership,” Mr Das says.
This makes NFTs closer to a piece of intellectual property such as a work of art or licence, as you can claim royalties or profit by exchanging it at a higher value later, Mr Das says. “They could provide a sustainable income stream.”
This income will depend on future demand and use, which makes NFTs difficult to value. “However, there is a credible use case for many forms of intellectual property, notably art, songs, videos,” Mr Das says.
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