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Scientists have discovered that moons could theoretically orbit all seven planets in the TRAPPIST-1 system despite the complex gravitational environment. Using computer simulations, a team of researchers have mapped stable zones where satellites could survive around each planet. They found that moons can remain stable up to about 40-45% of each planet’s sphere of gravitational influence. The neighbouring planets squeeze these stable zones slightly inward compared to isolated planets, but the effect is modest. Long term calculations suggest only tiny moons, roughly one ten millionth the mass of Earth, could survive the immense tidal forces.

The brutal respiratory infection has infected tens of thousands and killed at least 13 people in the U.S. in 2025

In 1892, astronomer Edward Emerson Barnard thought he saw a bright star near Venus, but then it vanished. We may now know why

In 1892, astronomer Edward Emerson Barnard thought he saw a bright star near Venus, but then it vanished. We may now know why

NASA’s Curiosity Mars rover used its black-and-white navigation cameras to capture panoramas at two times of day on Nov. 18, 2025, spanning periods that occurred on both the 4,722nd and 4,723rd Martian days, or sols, of the mission. The panoramas were captured at 4:15 p.m. on Sol 4,722 and 8:20 a.m. on Sol 4,723 (both at local Mars time), then merged together. Color was later added for an artistic interpretation of the scene with blue representing the morning panorama and yellow representing the afternoon one.

NASA/JPL-Caltech

Team members working with NASA’s Curiosity Mars rover created this “postcard” by commanding the rover to take images at two times of day on Nov. 18, 2025, spanning periods that occurred on both the 4,722nd and 4,723rd Martian days, or sols, of the mission.

The panoramas were captured at 4:15 p.m. on Sol 4,722 and 8:20 a.m. on Sol 4,723 (both at local Mars time), then merged together. Color was later added for an artistic interpretation of the scene with blue representing the morning panorama and yellow representing the afternoon one. The resulting “postcard” is similar to ones the rover took in June 2023 and November 2021. Adding color to these kinds of merged images helps different details stand out in the landscape.

Credit: NASA/JPL-Caltech

NASA/JPL-Caltech

Team members working with NASA’s Curiosity Mars rover created this “postcard” by commanding the rover to take images at two times of day on Nov. 18, 2025, spanning periods that occurred on both the 4,722nd and 4,723rd Martian days, or sols, of the mission.

The panoramas were captured at 4:15 p.m. on Sol 4,722 and 8:20 a.m. on Sol 4,723 (both at local Mars time), then merged together. Color was later added for an artistic interpretation of the scene with blue representing the morning panorama and yellow representing the afternoon one. The resulting “postcard” is similar to ones the rover took in June 2023 and November 2021. Adding color to these kinds of merged images helps different details stand out in the landscape.

Credit: NASA/JPL-Caltech

Reflect Orbital plans to launch thousands of reflective mirrors to produce "sunlight on demand", but researchers are sceptical about whether the reflected light will be enough to generate electricity

Reflect Orbital plans to launch thousands of reflective mirrors to produce "sunlight on demand", but researchers are sceptical about whether the reflected light will be enough to generate electricity

Drugs like Ozempic, Wegovy and Zepbound have transformed how we treat obesity, but more effective treatments could be down the road

Drugs like Ozempic, Wegovy and Zepbound have transformed how we treat obesity, but more effective treatments could be down the road

After the New START treaty expires in February, there will be no cap on the number of US and Russian nuclear weapons - but some are sceptical about whether the deal actually made the world safer

After the New START treaty expires in February, there will be no cap on the number of US and Russian nuclear weapons - but some are sceptical about whether the deal actually made the world safer

After the New START treaty expires in February, there will be no cap on the number of US and Russian nuclear weapons - but some are sceptical about whether the deal actually made the world safer

After the New START treaty expires in February, there will be no cap on the number of US and Russian nuclear weapons - but some are sceptical about whether the deal actually made the world safer

The BepiColombo mission has been on its way to Mercury since 2018 and will finally start orbiting the planet and taking X-ray images in the second half of 2026

The BepiColombo mission has been on its way to Mercury since 2018 and will finally start orbiting the planet and taking X-ray images in the second half of 2026

Flocean, a Norwegian company, is set to open the world’s first commercial-scale subsea desalination plant, an approach that could cut the cost and energy used to make seawater drinkable

Flocean, a Norwegian company, is set to open the world’s first commercial-scale subsea desalination plant, an approach that could cut the cost and energy used to make seawater drinkable

The price of weight-loss drugs like Wegovy put them out of reach for most people with obesity, but new arrivals and expiring patents should change that this year