Nasa has released a haunting sound from an enormous black hole more than 200 million light-years from Earth.
The black hole is at the centre of the Perseus galaxy cluster and has been associated with sound since 2003, the space agency said.
Pressure waves from the black hole have caused ripples in the galaxy cluster’s hot gas, but could only be translated into a note that humans are not able to hear.
But this year scientists created a sonification – when data is converted into sound – to make the sound audible for the first time.
“In this new sonification of Perseus, the sound waves astronomers previously identified were extracted and made audible for the first time,” Nasa said.
“The sound waves were extracted in radial directions, that is, outwards from the centre.
“The signals were then resynthesised into the range of human hearing by scaling them upward by 57 and 58 octaves above their true pitch.”
Black holes are points in space where gravity pulls so much that not even light up can escape, Nasa said.
In 2019, an image of a black hole was captured by scientists for the first time. The picture showed a black hole in the Messier 87 galaxy.
It had a mass more than six billion times that of the Sun and the picture helped to prove astronomers’ theories about black holes.
They used the Event Horizon Telescope, a global network of synchronised radio observatories, to capture the image.
Creating a sonification of a black hole has now allowed Nasa to prove that space is not completely silent.
“The popular misconception that there is no sound in space originates with the fact that most of space is essentially a vacuum, providing no medium for sound waves to propagate through,” the agency said.
“A galaxy cluster, on the other hand, has copious amounts of gas that envelop the hundreds or even thousands of galaxies within it, providing a medium for the sound waves to travel.”
The national orchestra
The burning issue
The internal combustion engine is facing a watershed moment – major manufacturer Volvo is to stop producing petroleum-powered vehicles by 2021 and countries in Europe, including the UK, have vowed to ban their sale before 2040. The National takes a look at the story of one of the most successful technologies of the last 100 years and how it has impacted life in the UAE.
Read part three: the age of the electric vehicle begins
Read part two: how climate change drove the race for an alternative
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Our legal consultant
Name: Hassan Mohsen Elhais
Position: legal consultant with Al Rowaad Advocates and Legal Consultants.
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Day 2
England: 277 & 19-0
West Indies: 154
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WHAT IS GRAPHENE?
It was discovered in 2004, when Russian-born Manchester scientists Andrei Geim and Kostya Novoselov were experimenting with sticky tape and graphite, the material used as lead in pencils.
Placing the tape on the graphite and peeling it, they managed to rip off thin flakes of carbon. In the beginning they got flakes consisting of many layers of graphene. But when they repeated the process many times, the flakes got thinner.
By separating the graphite fragments repeatedly, they managed to create flakes that were just one atom thick. Their experiment led to graphene being isolated for the very first time.
In 2010, Geim and Novoselov were awarded the Nobel Prize for Physics.
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• Increase defence spending to 2.5% of GDP by 2027 but given “turbulent times it may be necessary to go faster”
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• More F-35 fighter jets required in the next decade
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Specs
Engine: Duel electric motors
Power: 659hp
Torque: 1075Nm
On sale: Available for pre-order now
Price: On request
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Real estate tokenisation project
Dubai launched the pilot phase of its real estate tokenisation project last month.
The initiative focuses on converting real estate assets into digital tokens recorded on blockchain technology and helps in streamlining the process of buying, selling and investing, the Dubai Land Department said.
Dubai’s real estate tokenisation market is projected to reach Dh60 billion ($16.33 billion) by 2033, representing 7 per cent of the emirate’s total property transactions, according to the DLD.
Towering concerns
Young women have more “financial grit”, but fall behind on investing
In an October survey of young adults aged 16 to 25, Charles Schwab found young women are more driven to reach financial independence than young men (67 per cent versus. 58 per cent). They are more likely to take on extra work to make ends meet and see more value than men in creating a plan to achieve their financial goals. Yet, despite all these good ‘first’ measures, they are investing and saving less than young men – falling early into the financial gender gap.
While the women surveyed report spending 36 per cent less than men, they have far less savings than men ($1,267 versus $2,000) – a nearly 60 per cent difference.
In addition, twice as many young men as women say they would invest spare cash, and almost twice as many young men as women report having investment accounts (though most young adults do not invest at all).
“Despite their good intentions, young women start to fall behind their male counterparts in savings and investing early on in life,” said Carrie Schwab-Pomerantz, senior vice president, Charles Schwab. “They start off showing a strong financial planning mindset, but there is still room for further education when it comes to managing their day-to-day finances.”
Ms Schwab-Pomerantz says parents should be conveying the same messages to boys and girls about money, but should tailor those conversations based on the individual and gender.
"Our study shows that while boys are spending more than girls, they also are saving more. Have open and honest conversations with your daughters about the wage and savings gap," she said. "Teach kids about the importance of investing – especially girls, who as we see in this study, aren’t investing as much. Part of being financially prepared is learning to make the most of your money, and that means investing early and consistently."
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Selected fixtures
All times UAE
Wednesday
Poland v Portugal 10.45pm
Russia v Sweden 10.45pm
Friday
Belgium v Switzerland 10.45pm
Croatia v England 10.45pm
Saturday
Netherlands v Germany 10.45pm
Rep of Ireland v Denmark 10.45pm
Sunday
Poland v Italy 10.45pm
Monday
Spain v England 10.45pm
Tuesday
France v Germany 10.45pm
Rep of Ireland v Wales 10.45pm
Ferrari
HAJJAN
North Pole stats
Distance covered: 160km
Temperature: -40°C
Weight of equipment: 45kg
Altitude (metres above sea level): 0
Terrain: Ice rock
South Pole stats
Distance covered: 130km
Temperature: -50°C
Weight of equipment: 50kg
Altitude (metres above sea level): 3,300
Terrain: Flat ice
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Key figures in the life of the fort
Sheikh Dhiyab bin Isa (ruled 1761-1793) Built Qasr Al Hosn as a watchtower to guard over the only freshwater well on Abu Dhabi island.
Sheikh Shakhbut bin Dhiyab (ruled 1793-1816) Expanded the tower into a small fort and transferred his ruling place of residence from Liwa Oasis to the fort on the island.
Sheikh Tahnoon bin Shakhbut (ruled 1818-1833) Expanded Qasr Al Hosn further as Abu Dhabi grew from a small village of palm huts to a town of more than 5,000 inhabitants.
Sheikh Khalifa bin Shakhbut (ruled 1833-1845) Repaired and fortified the fort.
Sheikh Saeed bin Tahnoon (ruled 1845-1855) Turned Qasr Al Hosn into a strong two-storied structure.
Sheikh Zayed bin Khalifa (ruled 1855-1909) Expanded Qasr Al Hosn further to reflect the emirate's increasing prominence.
Sheikh Shakhbut bin Sultan (ruled 1928-1966) Renovated and enlarged Qasr Al Hosn, adding a decorative arch and two new villas.
Sheikh Zayed bin Sultan (ruled 1966-2004) Moved the royal residence to Al Manhal palace and kept his diwan at Qasr Al Hosn.
Sources: Jayanti Maitra, www.adach.ae
