James Webb Telescope Discovers Tiny New Moon Orbiting Uranus

Published

14 hours ago

August 23, 2025

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A team from the Southwest Research Institute has discovered a tiny new moon orbiting Uranus using NASA’s James Webb Space Telescope. The moon, called S/2025 U1, is just 6 miles (10 kilometers) wide, too small for Voyager 2 to detect during its 1986 flyby. This discovery brings Uranus’s total known moons to 29, with S/2025 U1 orbiting 35,000 miles from the planet…

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Massive Fireball Streaks Across Southern Japan, Lighting Up the Night Sky

Published

3 hours ago

August 24, 2025

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On Aug. 19, residents of southern Japan witnessed a brilliant fireball streaking across the night sky, lighting up cities from Kagoshima to Osaka. The meteor appeared at 11:08 p.m. local time, glowing green-blue with flashes so bright they rivaled the moon before bursting into orange-red fragments above the Pacific Ocean. Security and dashcam cameras captured the dazz…

Science

Ursa Major III May Be a Star Cluster, Not a Dark-Matter Dwarf Galaxy

Published

4 hours ago

August 24, 2025

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Astronomers have long thought Ursa Major III, also called UNIONS 1, was a dark-matter-packed dwarf galaxy. But new simulations suggest it may instead be a compact star cluster bound by black holes and neutron stars. Located 30,000 light-years away, Ursa Major III contains just ~60 visible stars yet shows puzzlingly high stellar velocities. The new analysis explains th…

Science

US X-37B Space Plane to Test Quantum Navigation System That Could Replace GPS

Published

17 hours ago

August 23, 2025

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The US military’s X-37B space plane will test a quantum inertial sensor for navigation, moving beyond GPS reliance. The technology, based on ultracold atoms, offers precise positioning in deep space, underwater, and GPS-denied zones. If successful, it may transform both defense and future space exploration, marking a critical step in operational autonomy.