Today is UN Asteroid Day, the annual event held to bring people together to learn about these astronomical objects.
One of its goals is to warn against complacency about a very real threat to life on Earth.
Why asteroids – and why now?
First discovered by astronomers more than 200 years ago, asteroids are chunks of debris left over from the formation of the Solar System about 4.5 billion years ago.
Most orbit between Mars and Jupiter, but some end up on a collision course with the Earth. And sometimes they strike with devastating violence.
On this day in 1908, one entered the atmosphere over Siberia and blew apart with the energy of 1,000 Hiroshima atomic bombs.
Known as the Tunguska Event, the explosion was heard farther than 800 kilometres away, and only its remoteness prevented huge loss of life.
Astronomers caution that it is only a matter of time before catastrophe strikes.
Their warnings were underlined in February 2013 when a fragment of asteroid exploded over Chelyabinsk central Russia with the violence of 30 atomic bombs, injuring more than 1,600 people.
How big a threat are they ?
Astronomers have identified more than 2,000 potentially hazardous asteroids, which make close approaches to the Earth and are large enough to cause major damage.
More than 150 are at least 1km across – large enough to devastate an entire country.
Most are on well-determined orbits and pose no risk in the foreseeable future.
But far smaller ones are capable of inflicting damage and many are only detectable just before impact, giving minimal warning.
In April, a five-metre wide asteroid named 2020 HS7 was spotted just hours before it came within 2,000km of an orbiting satellite – a cosmic hair’s breadth.
What is being done to protect the Earth ?
A global network of telescopes keeps watch for asteroids making a close approach to the Earth.
But conventional telescopes typically have to trade off their power to spot faint objects with the ability to cover a large area of the sky.
Specialist telescopes capable of doing both are now coming online.
They include Nasa's Asteroid Terrestrial Impact Last Alert System, based in Hawaii. This can scan the entire sky every 48 hours, and detect small asteroids at huge distances.
Last year, it detected a four-metre wide chunk of rock even before it passed the Moon. The object later crashed into the Caribbean near Puerto Rico.
Later this summer, the far more powerful Vera C Rubin Observatory will begin operations in Chile.
Its colossal 8.4-metre mirror will scan the entire sky every few nights, looking for incoming asteroids.
What could we do to stop a huge impact ?
The most obvious solution would be to attack the asteroid with nuclear weapons.
But that would almost certainly prove disastrous, turning one huge rock into a vast swarm of debris that would still crash into the Earth.
The best approach is to keep the asteroid intact and gently nudge it slightly off course. This requires much less energy and gives a far more predictable outcome.
It’s a strategy now being investigated by Nasa and the European Space Agency.
In 2022, the 160-metre wide asteroid Dimorphos will be the target of the Double Asteroid Redirection Test, with Nasa smashing a 500 kilogram probe into the object and watching how it responds.
Something far more powerful would be needed to push a big asteroid off course. And then a very significant problem rears its head.
Since the retirement of the Saturn V booster that sent astronauts to the Moon 50 years ago, no nation has built a rocket that is up to the job, although China is working on one.
Is there anything good about asteroids ?
Once dismissed as the "vermin of the skies", asteroids are now thought to harbour colossal reserves of gold, platinum and other precious metals worth $700 billion billion, some estimates claim.
This has sparked commercial interest in “space mining”, with robots extracting the metals from the asteroids and shipping them back to Earth.
The commercial viability of such operations should become clearer in the next few years after a Nasa mission set for launch in 2022.
The target is Psyche, an asteroid thought to be made almost entirely of metals.
So we have nothing to fear in the meantime?
Most astronomers would put the risk of a major asteroid strike well below that of another virus pandemic.
But the risk is not zero: World Asteroid Day coincides with the Earth passing through the region of space that once harboured the Tunguska object.
It is just possible that something else is lurking there now, ready to remind us of the cosmic threat that stalks our planet.
Robert Matthews is visiting professor of science at Aston University, Birmingham, UK
FIXTURES
All kick-off times 10.45pm UAE ( 4 GMT)
Tuesday
Mairobr v Liverpool
Spartak Moscow v Sevilla
Feyenoord v Shakhtar Donetsk
Manchester City v Napoli
Monaco v Besiktas
RB Leipzig v Porto
Apoel Nicosia v Borussia Dortmund
Real Madrid v Tottenham Hotspur
Wednesday
Benfica v Manchester United
CSKA Moscow v Basel
Bayern Munich v Celtic
Anderlecht v Paris Saint-Germain
Qarabag v Atletico Madrid
Chelsea v Roma
Barcelona v Olympiakos
Juventus v Sporting Lisbon
GAC GS8 Specs
Engine: 2.0-litre 4cyl turbo
Power: 248hp at 5,200rpm
Torque: 400Nm at 1,750-4,000rpm
Transmission: 8-speed auto
Fuel consumption: 9.1L/100km
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Price: From Dh149,900
Labour dispute
The insured employee may still file an ILOE claim even if a labour dispute is ongoing post termination, but the insurer may suspend or reject payment, until the courts resolve the dispute, especially if the reason for termination is contested. The outcome of the labour court proceedings can directly affect eligibility.
- Abdullah Ishnaneh, Partner, BSA Law
TEACHERS' PAY - WHAT YOU NEED TO KNOW
Pay varies significantly depending on the school, its rating and the curriculum. Here's a rough guide as of January 2021:
- top end schools tend to pay Dh16,000-17,000 a month - plus a monthly housing allowance of up to Dh6,000. These tend to be British curriculum schools rated 'outstanding' or 'very good', followed by American schools
- average salary across curriculums and skill levels is about Dh10,000, recruiters say
- it is becoming more common for schools to provide accommodation, sometimes in an apartment block with other teachers, rather than hand teachers a cash housing allowance
- some strong performing schools have cut back on salaries since the pandemic began, sometimes offering Dh16,000 including the housing allowance, which reflects the slump in rental costs, and sheer demand for jobs
- maths and science teachers are most in demand and some schools will pay up to Dh3,000 more than other teachers in recognition of their technical skills
- at the other end of the market, teachers in some Indian schools, where fees are lower and competition among applicants is intense, can be paid as low as Dh3,000 per month
- in Indian schools, it has also become common for teachers to share residential accommodation, living in a block with colleagues
Dr Afridi's warning signs of digital addiction
Spending an excessive amount of time on the phone.
Neglecting personal, social, or academic responsibilities.
Losing interest in other activities or hobbies that were once enjoyed.
Having withdrawal symptoms like feeling anxious, restless, or upset when the technology is not available.
Experiencing sleep disturbances or changes in sleep patterns.
What are the guidelines?
Under 18 months: Avoid screen time altogether, except for video chatting with family.
Aged 18-24 months: If screens are introduced, it should be high-quality content watched with a caregiver to help the child understand what they are seeing.
Aged 2-5 years: Limit to one-hour per day of high-quality programming, with co-viewing whenever possible.
Aged 6-12 years: Set consistent limits on screen time to ensure it does not interfere with sleep, physical activity, or social interactions.
Teenagers: Encourage a balanced approach – screens should not replace sleep, exercise, or face-to-face socialisation.
Source: American Paediatric Association
Types of bank fraud
1) Phishing
Fraudsters send an unsolicited email that appears to be from a financial institution or online retailer. The hoax email requests that you provide sensitive information, often by clicking on to a link leading to a fake website.
2) Smishing
The SMS equivalent of phishing. Fraudsters falsify the telephone number through “text spoofing,” so that it appears to be a genuine text from the bank.
3) Vishing
The telephone equivalent of phishing and smishing. Fraudsters may pose as bank staff, police or government officials. They may persuade the consumer to transfer money or divulge personal information.
4) SIM swap
Fraudsters duplicate the SIM of your mobile number without your knowledge or authorisation, allowing them to conduct financial transactions with your bank.
5) Identity theft
Someone illegally obtains your confidential information, through various ways, such as theft of your wallet, bank and utility bill statements, computer intrusion and social networks.
6) Prize scams
Fraudsters claiming to be authorised representatives from well-known organisations (such as Etisalat, du, Dubai Shopping Festival, Expo2020, Lulu Hypermarket etc) contact victims to tell them they have won a cash prize and request them to share confidential banking details to transfer the prize money.
THE%20SWIMMERS
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The biog
Age: 59
From: Giza Governorate, Egypt
Family: A daughter, two sons and wife
Favourite tree: Ghaf
Runner up favourite tree: Frankincense
Favourite place on Sir Bani Yas Island: “I love all of Sir Bani Yas. Every spot of Sir Bani Yas, I love it.”
Age 26
Born May 17, 1991
Height 1.80 metres
Birthplace Sydney, Australia
Residence Eastbourne, England
Plays Right-handed
WTA titles 3
Prize money US$5,761,870 (Dh21,162,343.75)
Wins / losses 312 / 181
Wonka
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Specs
Engine: Duel electric motors
Power: 659hp
Torque: 1075Nm
On sale: Available for pre-order now
Price: On request
If you go
The flights
Etihad and Emirates fly direct from the UAE to Chicago from Dh5,215 return including taxes.
The hotels
Recommended hotels include the Intercontinental Chicago Magnificent Mile, located in an iconic skyscraper complete with a 1929 Olympic-size swimming pool from US$299 (Dh1,100) per night including taxes, and the Omni Chicago Hotel, an excellent value downtown address with elegant art deco furnishings and an excellent in-house restaurant. Rooms from US$239 (Dh877) per night including taxes.
The Case For Trump
By Victor Davis Hanson
Tearful appearance
Chancellor Rachel Reeves set markets on edge as she appeared visibly distraught in parliament on Wednesday.
Legislative setbacks for the government have blown a new hole in the budgetary calculations at a time when the deficit is stubbornly large and the economy is struggling to grow.
She appeared with Keir Starmer on Thursday and the pair embraced, but he had failed to give her his backing as she cried a day earlier.
A spokesman said her upset demeanour was due to a personal matter.
ESSENTIALS
The flights
Emirates flies from Dubai to Phnom Penh via Yangon from Dh2,700 return including taxes. Cambodia Bayon Airlines and Cambodia Angkor Air offer return flights from Phnom Penh to Siem Reap from Dh250 return including taxes. The flight takes about 45 minutes.
The hotels
Rooms at the Raffles Le Royal in Phnom Penh cost from $225 (Dh826) per night including taxes. Rooms at the Grand Hotel d'Angkor cost from $261 (Dh960) per night including taxes.
The tours
A cyclo architecture tour of Phnom Penh costs from $20 (Dh75) per person for about three hours, with Khmer Architecture Tours. Tailor-made tours of all of Cambodia, or sites like Angkor alone, can be arranged by About Asia Travel. Emirates Holidays also offers packages.
MOUNTAINHEAD REVIEW
Starring: Ramy Youssef, Steve Carell, Jason Schwartzman
Director: Jesse Armstrong
Rating: 3.5/5
SPECS
%3Cp%3EEngine%3A%20Supercharged%203.5-litre%20V6%0D%3Cbr%3EPower%3A%20400hp%0D%3Cbr%3ETorque%3A%20430Nm%0D%3Cbr%3EOn%20sale%3A%20Now%0D%3Cbr%3EPrice%3A%20From%20Dh450%2C000%0D%3Cbr%3E%3C%2Fp%3E%0A
RESULTS
%3Cp%3E%3Cstrong%3E6pm%3A%20Baniyas%20%E2%80%93%20Group%202%20(PA)%20Dh97%2C500%20(Dirt)%201%2C400m%3C%2Fstrong%3E%3Cbr%3EWinner%3A%20AF%20Alajaj%2C%20Tadhg%20O%E2%80%99Shea%20(jockey)%2C%20Ernst%20Oertel%20(trainer)%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3E6.35pm%3A%20The%20Pointe%20%E2%80%93%20Maiden%20(TB)%20Dh82%2C500%20(D)%201%2C200m%3C%2Fstrong%3E%3Cbr%3EWinner%3A%20Awasef%2C%20Pat%20Dobbs%2C%20Doug%20Watson%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3E7.10pm%3A%20Palm%20West%20Beach%20%E2%80%93%20Maiden%20(TB)%20Dh82%2C500%20(D)%201%2C400m%3C%2Fstrong%3E%3Cbr%3EWinner%3A%20Long%20Kiss%2C%20Jose%20da%20Silva%2C%20Antonio%20Cintra%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3E7.45pm%3A%20The%20View%20at%20the%20Palm%20%E2%80%93%20Handicap%20(TB)%20Dh87%2C500%20(D)%201%2C200m%3C%2Fstrong%3E%3Cbr%3EWinner%3A%20Ranaan%2C%20Tadhg%20O%E2%80%99Shea%2C%20Bhupat%20Seemar%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3E8.20pm%3A%20Nakheel%20%E2%80%93%20Handicap%20(TB)%20Dh105%2C000%20(D)%201%2C400m%3C%2Fstrong%3E%3Cbr%3EWinner%3A%20Raaeb%2C%20Antonio%20Fresu%2C%20Musabah%20Al%20Muhairi%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3E8.55pm%3A%20The%20Club%20%E2%80%93%20Handicap%20(TB)%20Dh95%2C000%20(D)%201%2C900m%3C%2Fstrong%3E%3Cbr%3EWinner%3A%20Qareeb%2C%20Sam%20Hitchcock%2C%20Doug%20Watson%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3E9.30pm%3A%20Palm%20Beach%20Towers%20%E2%80%93%20Handicap%20(TB)%20Dh87%2C500%20(D)%201%2C600m%3C%2Fstrong%3E%3Cbr%3EWinner%3A%20Falsehood%2C%20Adrie%20de%20Vries%2C%20Musabah%20Al%20Muhairi%3C%2Fp%3E%0A
HOW TO WATCH
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Mohammed bin Zayed Majlis
Qosty Byogaani
Starring: Hani Razmzi, Maya Nasir and Hassan Hosny
Four stars
