
-
Kenya's economy faces climate change risks: World Bank
-
Lessons and liquids: buried alive in Myanmar's earthquake
-
Nintendo Switch 2 sparks excitement despite high price
-
Sri Lanka's crackdown on dogs for India PM's visit sparks protest
-
China vows 'countermeasures' to sweeping new US tariffs
-
Trump jolts allies, foes and markets with tariff blitz
-
How Trump's 'liberation day' tariffs will impact China
-
Europe hits out at Trump tariffs, keeps door open for talks
-
Australia sweats through hottest 12 months on record: official data
-
South African artist champions hyenas in 'eco-queer' quest
-
Taiwan says US tariffs 'highly unreasonable'
-
Trump escalates trade war with sweeping global tariffs
-
China says opposes new US tariffs, vows 'countermeasures'
-
Quake-hit Myanmar's junta chief to head to Bangkok summit
-
New Spielberg, Nolan films teased at CinemaCon
-
Shiny and deadly, unexploded munitions a threat to Gaza children
-
Stocks tank, havens rally as Trump tariffs fan trade war
-
Financial markets tumble after Trump tariff announcement
-
Europe riled, but plans cool-headed response to Trump's tariffs
-
'Shenmue' voted most influential video game ever in UK poll
-
Revealed: Why monkeys are better at yodelling than humans
-
Key details on Trump's market-shaking tariffs
-
US business groups voice dismay at Trump's new tariffs
-
Trump sparks trade war with sweeping global tariffs
-
US stocks end up, but volatility ahead after latest Trump tariffs
-
Boeing chief reports progress to Senate panel after 'serious missteps'
-
Is Musk's political career descending to Earth?
-
On Mexico-US border, Trump's 'Liberation Day' brings fears for future
-
Tesla sales slump as pressure piles on Musk
-
Amazon makes last-minute bid for TikTok: report
-
Tesla first quarter sales sink amid anger over Musk politics
-
World's tiniest pacemaker is smaller than grain of rice
-
Nintendo says Switch 2 console to be launched on June 5
-
Certain foreign firms must 'self-certify' with Trump diversity rules: US embassies
-
Nigerian president sacks board of state oil company
-
Heathrow 'warned about power supply' days before shutdown
-
Epstein accuser Virginia Giuffre 'stable' after car crash
-
Swedish insurer drops $160 mn Tesla stake over labour rights
-
Stock markets mixed as uncertainty rules ahead of Trump tariffs
-
Warner showcases 'Superman' reboot, new DiCaprio film
-
Asian markets edge up but uncertainty rules ahead of Trump tariffs
-
UK imposes online entry permit on European visitors
-
How a Brazilian chief is staving off Amazon destruction
-
Brazil binman finds newborn baby on garbage route
-
Trump set to unleash 'Liberation Day' tariffs
-
GM leads first quarter US auto sales as tariffs loom
-
Trump 'perfecting' new tariffs as nervous world braces
-
Trump puts world on edge as 'Liberation Day' tariffs loom
-
UK vows £20 million to boost drone and 'flying taxi' services
-
Ford's US auto sales dip in first quarter as tariffs loom

Webb telescope finds CO2 for first time in exoplanet atmosphere
The months-old James Webb Space Telescope has added another major scientific discovery to its growing list: detecting for the first time signs of carbon dioxide in the atmosphere of a planet outside our solar system.
Although the exoplanet would never be able to support life as we know it, the successful discovery of CO2 gives researchers hope that similar observations could be carried out on rocky objects more hospitable to life.
"My first thought: wow, we really do have a chance to detect the atmospheres of terrestrial-size planets," tweeted Natalie Batalha, a professor at the University of California at Santa Cruz and one of hundreds who worked on the Webb project.
Their study of exoplanet WASP-39, a hot gas giant closely orbiting a star 700 light years away, will soon be published in the journal Nature.
"For me, it opens a door for future research on super-Earths (planets larger than Earth but smaller than Neptune), or even Earth-sized planets," Pierre-Olivier Lagage, an astrophysicist with France's Atomic Energy Commission (CEA), told AFP.
The detection of CO2 will also help scientists learn more about how WASP-39 formed, NASA said in a press release. The exoplanet, which orbits its star once every four Earth days, has a mass one-quarter that of Jupiter but a diameter 1.3 times bigger.
The frequency of its orbit and large atmosphere made WASP-39 an ideal candidate for an early test of Webb's state-of-the-art infrared sensor, known as NIRSpec.
Each time the exoplanet crosses in front of its star, it blocks out an almost imperceptible amount of light.
But around the edges of the planet, a tiny amount of light passes through the atmosphere.
Webb's highly sensitive NIRSpec can detect the small changes that the atmosphere has on the light, allowing scientists to determine its gas composition.
The Hubble and Spitzer telescopes had already detected water vapor, sodium and potassium in WASP-39's atmosphere, but carbon dioxide can now be added to that list thanks to Webb and its NIRSpec instrument.
"It was a special moment, crossing an important threshold in exoplanet sciences," said Zafar Rustamkulov, a Johns Hopkins University researcher, in the NASA press release.
A.Levy--CPN