Astronomers have uncovered the feeding schedule of a supermassive black hole, revealing that it consumes material about every three and a half years.
This discovery provides critical insights into the behaviour of these mysterious cosmic forces, deepening scientists’ understanding of the powerful formations that shape the universe.
A team of astronomers used three space telescopes to make these observations, including Nasa’s Chandra X-ray Observatory, with findings published in The Astrophysical Journal Letters on Wednesday.
The subject of this study was a supermassive black hole located at the centre of a galaxy about 860 million light-years from Earth.
With a mass of about 50 million times that of the Sun, this black hole was observed engaging in an interaction with a star that ventured too close to its immense gravitational pull.
Astronomers first noticed the black hole's activity when the galaxy it resides in experienced a significant increase in brightness in 2018.
They identified this as a tidal disruption event, which occurs when a star is torn apart by the intense gravitational forces of a black hole.
As the star was pulled apart, its material heated up, producing X-ray and ultraviolet light that was observed by the telescopes.
This emission eventually faded, suggesting that the black hole had consumed the matter.
However, astronomers were surprised when, about two years later, the X-ray and UV light from the galaxy flared up again.
This unexpected resurgence suggested that the star had been only partially consumed during its first encounter, with more material being stripped away as it neared the black hole again.
“Initially, we thought this was a garden-variety case of a black hole totally ripping a star apart,” said Thomas Wevers from the Space Telescope Science Institute in Baltimore.
“But instead, the star appears to be living to die another day.”
Going into orbit
The astronomers learnt that after the first encounter, the star moved into a highly elongated orbit around the black hole.
When it eventually approached the black hole again, the galaxy lit up with X-ray and UV light as more of the star’s material was consumed.
This discovery allowed the scientists to calculate the star's orbital period, helping them to learn that the black hole consumes material approximately every three and a half years.
The most recent event, which concluded in August last year, was timed by researchers using Chandra observations to confirm the exact moment when the black hole had finished devouring the star.
“The telltale sign of this stellar snack ending was a sudden drop in the X-rays, and that's exactly what we saw in our Chandra observations,” said Dheeraj Pasham of the Massachusetts Institute of Technology.
“In August last year, the black hole was essentially wiping its mouth and pushing back from the table.”
The team predicts that the black hole's next encounter with the star will begin between May and August 2025, although it is expected to be smaller, as the star has mostly already been ripped to shreds.
The fate of the star probably began when it was part of a binary system, orbiting closely with a companion star. As the pair approached the black hole, the intense gravitational forces tore them apart, sending one star hurtling into space while the other was captured in a death spiral around the black hole.
The specs
AT4 Ultimate, as tested
Engine: 6.2-litre V8
Power: 420hp
Torque: 623Nm
Transmission: 10-speed automatic
Price: From Dh330,800 (Elevation: Dh236,400; AT4: Dh286,800; Denali: Dh345,800)
On sale: Now
How much do leading UAE’s UK curriculum schools charge for Year 6?
- Nord Anglia International School (Dubai) – Dh85,032
- Kings School Al Barsha (Dubai) – Dh71,905
- Brighton College Abu Dhabi - Dh68,560
- Jumeirah English Speaking School (Dubai) – Dh59,728
- Gems Wellington International School – Dubai Branch – Dh58,488
- The British School Al Khubairat (Abu Dhabi) - Dh54,170
- Dubai English Speaking School – Dh51,269
*Annual tuition fees covering the 2024/2025 academic year
'Top Gun: Maverick'
Rating: 4/5
Directed by: Joseph Kosinski
Starring: Tom Cruise, Val Kilmer, Jennifer Connelly, Jon Hamm, Miles Teller, Glen Powell, Ed Harris
UAE currency: the story behind the money in your pockets
Killing of Qassem Suleimani
Racecard
%3Cp%3E1.45pm%3A%20Bin%20Dasmal%20Contracting%20Cup%20%E2%80%93%20Maiden%20(PA)%20Dh50%2C000%20(Dirt)%201%2C200m%3Cbr%3E2.15pm%3A%20Al%20Shafar%20Investment%20Cup%20%E2%80%93%20Maiden%20(TB)%20Dh60%2C000%20(D)%201%2C200m%3Cbr%3E2.45pm%3A%202023%20Cup%20by%20Emirates%20sprint%20series%20%E2%80%93%20Handicap%20(TB)%20Dh84%2C000%20(D)%201%2C200m%3Cbr%3E3.15pm%3A%20HIVE%20Cup%20%E2%80%93%20Handicap%20(TB)%20Dh68%2C000%20(D)%201%2C400m%3Cbr%3E3.45pm%3A%20Jebel%20Ali%20Mile%20Prep%20by%20Shadwell%20%E2%80%93%20Conditions%20(TB)%20Dh100%2C000%20(D)%201%2C600m%3Cbr%3E4.15pm%3A%20JARC%20Cup%20%E2%80%93%20Maiden%20(TB)%20Dh60%2C000%20(D)%201%2C600m%3Cbr%3E4.45pm%3A%20Deira%20Cup%20by%20Emirates%20Sprint%20series%20%E2%80%93%20Handicap%20(TB)%20Dh76%2C000%20(D)%201%2C950m%3C%2Fp%3E%0A
Types of policy
Term life insurance: this is the cheapest and most-popular form of life cover. You pay a regular monthly premium for a pre-agreed period, typically anything between five and 25 years, or possibly longer. If you die within that time, the policy will pay a cash lump sum, which is typically tax-free even outside the UAE. If you die after the policy ends, you do not get anything in return. There is no cash-in value at any time. Once you stop paying premiums, cover stops.
Whole-of-life insurance: as its name suggests, this type of life cover is designed to run for the rest of your life. You pay regular monthly premiums and in return, get a guaranteed cash lump sum whenever you die. As a result, premiums are typically much higher than one term life insurance, although they do not usually increase with age. In some cases, you have to keep up premiums for as long as you live, although there may be a cut-off period, say, at age 80 but it can go as high as 95. There are penalties if you don’t last the course and you may get a lot less than you paid in.
Critical illness cover: this pays a cash lump sum if you suffer from a serious illness such as cancer, heart disease or stroke. Some policies cover as many as 50 different illnesses, although cancer triggers by far the most claims. The payout is designed to cover major financial responsibilities such as a mortgage or children’s education fees if you fall ill and are unable to work. It is cost effective to combine it with life insurance, with the policy paying out once if you either die or suffer a serious illness.
Income protection: this pays a replacement income if you fall ill and are unable to continue working. On the best policies, this will continue either until you recover, or reach retirement age. Unlike critical illness cover, policies will typically pay out for stress and musculoskeletal problems such as back trouble.
The specs
Engine: 4.0-litre V8 twin-turbocharged and three electric motors
Power: Combined output 920hp
Torque: 730Nm at 4,000-7,000rpm
Transmission: 8-speed dual-clutch automatic
Fuel consumption: 11.2L/100km
On sale: Now, deliveries expected later in 2025
Price: expected to start at Dh1,432,000
In-demand jobs and monthly salaries
- Technology expert in robotics and automation: Dh20,000 to Dh40,000
- Energy engineer: Dh25,000 to Dh30,000
- Production engineer: Dh30,000 to Dh40,000
- Data-driven supply chain management professional: Dh30,000 to Dh50,000
- HR leader: Dh40,000 to Dh60,000
- Engineering leader: Dh30,000 to Dh55,000
- Project manager: Dh55,000 to Dh65,000
- Senior reservoir engineer: Dh40,000 to Dh55,000
- Senior drilling engineer: Dh38,000 to Dh46,000
- Senior process engineer: Dh28,000 to Dh38,000
- Senior maintenance engineer: Dh22,000 to Dh34,000
- Field engineer: Dh6,500 to Dh7,500
- Field supervisor: Dh9,000 to Dh12,000
- Field operator: Dh5,000 to Dh7,000
If you go
Flight connections to Ulaanbaatar are available through a variety of hubs, including Seoul and Beijing, with airlines including Mongolian Airlines and Korean Air. While some nationalities, such as Americans, don’t need a tourist visa for Mongolia, others, including UAE citizens, can obtain a visa on arrival, while others including UK citizens, need to obtain a visa in advance. Contact the Mongolian Embassy in the UAE for more information.
Nomadic Road offers expedition-style trips to Mongolia in January and August, and other destinations during most other months. Its nine-day August 2020 Mongolia trip will cost from $5,250 per person based on two sharing, including airport transfers, two nights’ hotel accommodation in Ulaanbaatar, vehicle rental, fuel, third party vehicle liability insurance, the services of a guide and support team, accommodation, food and entrance fees; nomadicroad.com
A fully guided three-day, two-night itinerary at Three Camel Lodge costs from $2,420 per person based on two sharing, including airport transfers, accommodation, meals and excursions including the Yol Valley and Flaming Cliffs. A return internal flight from Ulaanbaatar to Dalanzadgad costs $300 per person and the flight takes 90 minutes each way; threecamellodge.com
Jetour T1 specs
Engine: 2-litre turbocharged
Power: 254hp
Torque: 390Nm
Price: From Dh126,000
Available: Now
PSA DUBAI WORLD SERIES FINALS LINE-UP
Men’s:
Mohamed El Shorbagy (EGY)
Ali Farag (EGY)
Simon Rosner (GER)
Tarek Momen (EGY)
Miguel Angel Rodriguez (COL)
Gregory Gaultier (FRA)
Karim Abdel Gawad (EGY)
Nick Matthew (ENG)
Women's:
Nour El Sherbini (EGY)
Raneem El Welily (EGY)
Nour El Tayeb (EGY)
Laura Massaro (ENG)
Joelle King (NZE)
Camille Serme (FRA)
Nouran Gohar (EGY)
Sarah-Jane Perry (ENG)
