Science & Technology
NASA says ‘city killer’ asteroid has a 3.1 % chance of striking Earth in 2032
Despite the rising odds, experts say there is no need for alarm
An asteroid that could level a city now has a 3.1-percent chance of striking Earth in 2032, according to NASA data released Tuesday — making it the most threatening space rock ever recorded by modern forecasting.
Despite the rising odds, experts say there is no need for alarm. The global astronomical community is closely monitoring the situation and the James Webb Space Telescope is set to fix its gaze on the object, known as 2024 YR4, next month.
“I’m not panicking,” Bruce Betts, chief scientist for the nonprofit Planetary Society told AFP.
“Naturally when you see the percentages go up, it doesn’t make you feel warm and fuzzy and good,” he added, but explained that as astronomers gather more data, the probability will likely edge up before rapidly dropping to zero.
2024 YR4 was first detected on December 27 last year by the El Sauce Observatory in Chile.
Astronomers estimate its size to be between 130 and 300 feet (40–90 meters) wide, based on its brightness. Analysis of its light signatures suggests it has a fairly typical composition, rather than being a rare metal-rich asteroid.
The International Asteroid Warning Network (IAWN), a worldwide planetary defense collaboration, issued a warning memo on January 29 after the impact probability had crossed one percent. Since then, the figure has fluctuated but continues to trend upward.
NASA’s latest calculations estimate the impact probability at 3.1 percent, up from 1.6 percent last month, with a potential Earth impact date of December 22, 2032.
Richard Moissl, head of the European Space Agency’s planetary defense office, which puts the risk slightly lower at 2.8 percent told AFP that this “is not a crisis at this point in time. This is not the dinosaur killer. This is not the planet killer. This is at most dangerous for a city.”
If the risk rises over 10 percent, IAWN would issue a formal warning, leading to a “recommendation for all UN members who have territories in potentially threatened areas to start terrestrial preparedness,” explained Moissl.
Unlike the six-mile-wide (10-kilometer-wide) asteroid that wiped out the dinosaurs 66 million years ago, 2024 YR4 is classified as a “city killer” — not a global catastrophe, but still capable of causing significant destruction.
Its potential devastation comes less from its size and more from its velocity, which could be nearly 40,000 miles per hour if it hits.
If it enters Earth’s atmosphere, the most likely scenario is an airburst, meaning it would explode midair with a force of approximately eight megatons of TNT — more than 500 times the power of the Hiroshima bomb.
But an impact crater cannot be ruled out if the size is closer to the higher end of estimates, said Betts.
The potential impact corridor spans the eastern Pacific, northern South America, the Atlantic, Africa, the Arabian Peninsula, and South Asia — though Moissl emphasized it is far too early for people to consider drastic decisions like relocation.
The good news: there’s ample time to act.
NASA’s 2022 DART mission proved that spacecraft can successfully alter an asteroid’s path, and scientists have theorized other methods, such as using lasers to create thrust by vaporizing part of the surface, pulling it off course with a spacecraft’s gravity, or even using nuclear explosions as a last resort. — Agence France-Presse
Science & Technology
Meta turns off Instagram’s private messaging encryption worldwide
Meta said the decision was based on low user adoption, though critics argue optional privacy tools often see limited use because users must manually activate them.
Instagram has disabled its end-to-end encrypted (E2EE) direct messaging feature worldwide, marking a major reversal by parent company Meta on its previous commitment to stronger user privacy protections.
The move means Instagram users can no longer send ultra-private direct messages protected by E2EE — a security system that allows only the sender and recipient to read messages. Without the feature, Instagram can technically access the content of direct messages, including photos, videos and voice notes.
Meta had previously promoted encryption as “the future is private.” In 2019, CEO Mark Zuckerberg pledged to expand the technology across the company’s platforms.
Facebook Messenger adopted E2EE in 2023, while Instagram introduced it as an optional feature with plans to make it standard.
However, Meta has now abandoned the wider Instagram rollout and updated the app’s terms in March to confirm encrypted messaging would no longer be supported after 8 May 2026.
Meta said the decision was based on low user adoption, though critics argue optional privacy tools often see limited use because users must manually activate them.
The move has divided opinion. Child protection groups, including the NSPCC, welcomed the change, saying encryption can make it harder to detect child grooming and abuse online.
Privacy advocates criticised the decision. Maya Thomas of Big Brother Watch warned the move weakens online privacy protections and could increase pressure on other social media companies to scale back encryption.
End-to-end encryption remains standard on platforms including WhatsApp, Signal, Apple’s iMessage and Google Messages, while other platforms continue to take mixed approaches to private messaging.
Science & Technology
James Webb Telescope captures clearest-ever view of exoplanet’s surface
Astronomers using NASA’s James Webb Space Telescope have obtained the clearest view yet of the surface of a rocky exoplanet, revealing a scorched, atmosphere-free world that scientists say resembles a giant version of Mercury.
The planet, known as LHS 3844 b and nicknamed “Kua’kua,” appears to be a barren, uninhabitable world with extreme temperature swings and no detectable atmosphere, according to a study published this week in Nature Astronomy.
Researchers said the planet’s surface is likely covered in dark volcanic rock and ancient regolith — loose rocky debris formed over billions of years from relentless bombardment by radiation and micrometeorite impacts.
“This planet is not a nice place,” said astronomer Laura Kreidberg, senior author of the study. “It’s a hellish, barren rock — much more similar to Mercury than Earth.”
Located about 49 light-years away, LHS 3844 b orbits a small red dwarf star and completes a full orbit every 11 hours. The planet is tidally locked, meaning one side permanently faces its star while the other remains in darkness — similar to how the Moon always shows the same face to Earth.
Scientists found the planet’s dayside reaches roughly 1,340 degrees Fahrenheit (725 degrees Celsius), while the nightside showed almost no detectable heat.
Using Webb’s infrared instruments, researchers were able to directly analyze light coming from the planet’s surface — a major breakthrough for exoplanet science.
“Different rocks have different spectral fingerprints,” said lead author Sebastian Zieba. “Dark volcanic rocks like basalt matched our observations much better than brighter rocks like granite.”
The findings mark a new phase in exoplanet research, shifting beyond atmospheric studies toward direct analysis of alien geology and surface composition.
Since becoming operational in 2022, the Webb telescope has transformed scientists’ understanding of planets beyond the solar system, helping identify atmospheric chemistry, weather patterns and now even the nature of distant planetary surfaces.
Researchers said the absence of an atmosphere on LHS 3844 b means there is little protection from stellar radiation and virtually no possibility of liquid water — a key ingredient for life.
“So overall, this is almost certainly not a habitable world,” Zieba said.
Science & Technology
Afghanistan launches first 5G trial in Kabul to boost telecom services
According to ministry spokesperson Enayatullah Alokozai, AWCC has upgraded 74 telecom antennas in Kabul to 5G on a trial basis.
Afghanistan has launched its first-ever 5G telecommunications trial in Kabul, marking a major milestone in efforts to modernise the country’s digital infrastructure.
The announcement followed a meeting between Hamdullah Nomani, Minister of Communications and Information Technology, and Aliullah Sarwari, head of the Afghan Wireless Communication Company (AWCC), where discussions focused on expanding telecom coverage, improving service quality, and extending connectivity to remote regions.
According to ministry spokesperson Enayatullah Alokozai, AWCC has upgraded 74 telecom antennas in Kabul to 5G on a trial basis. Once technical preparations and testing are completed, the company plans to extend 5G services to other provinces.
Officials also reported steady progress on broader infrastructure development. Eight telecom sites approved during previous official visits to northern and southeastern provinces have been completed, one is nearing completion, and construction continues on two additional sites expected to become operational soon.
In parallel, the Afghanistan Telecom Regulatory Authority (ATRA) has approved eight more telecom sites under the Telecom Development Fund (TDF), with implementation scheduled in the coming months.
Sarwari noted that since the beginning of 2026, AWCC has built and activated 46 telecom sites using its development budget, while work continues on a further 186 sites nationwide.
He also thanked the Ministry of Communications and Information Technology for its ongoing support in facilitating sector growth and improving service delivery.
Nomani meanwhile emphasised that telecommunications play a crucial role in national development and said the government remains committed to working closely with operators to expand modern, high-quality digital services.
Officials added that cooperation between the ministry, regulators, and telecom companies will continue across all operational and regulatory areas to strengthen Afghanistan’s communications network.
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