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News
Before MeerKAT, South Africa's Karoo telescope had its own ways of reading the stars
1+ day, 20+ hour ago (1012+ words) Around the SKA telescope, old star stories survive through practical knowledge, new meanings and changing community traditions. (CREDIT: Shutterstock) Long before enormous radio dishes began rising from South Africa’s Karoo, people there were already watching the sky. They used celestial…...
Atomic images reveal why one common mineral is superior at producing ice
1+ week, 4+ day ago (1208+ words) Nanoscale imaging shows ice can form across flat microcline surfaces without relying only on cracks or step edges. (CREDIT: Bielefeld University/Magnus Krenz) A mineral surface does not always need a crack, pore or other obvious defect to help ice…...
The Moon???s far side could open a window into the universe before the first stars were born
1+ week, 5+ day ago (1208+ words) Radio telescopes on the Moon’s far side could detect ancient hydrogen and reveal the universe before the first stars formed. (CREDIT: Shutterstock) The far side of the Moon is a battered landscape of mountains, basins and overlapping craters, strikingly different…...
Scientists develop a greener, catalyst-free, rocket thruster to power the next generation of spacecraft
2+ week, 6+ day ago (1074+ words) An ADN green rocket thruster ignited electrically at room temperature, eliminating the need for a preheated catalyst bed. (CREDIT: Wikimedia / AI-Generated / CC BY-SA 4.0) An experimental “green” rocket thruster has fired successfully using ammonium dinitramide fuel without the catalyst bed normally…...
Apophis will zoom past Earth in 2029, turning a rare flyby into a planetary defense test
2+ week, 6+ day ago (1172+ words) The Apophis 2029 flyby could reveal asteroid surface shifts, spin changes and new lessons for planetary defense. (CREDIT: Wikimedia / CC BY-SA 4.0) On April 13, 2029, a 340-meter asteroid will sweep past Earth at about 38,000 kilometers, close enough for its gravity-driven changes to become…...
Astronomers develop a faster way to simulate the complicated motion of binary asteroids
3+ week, 11+ hour ago (1024+ words) Binary asteroids can behave less like two simple rocks in orbit and more like a tightly coupled mechanical system. Their shapes, positions and rotations all influence one another, making long-term predictions difficult and exposing weaknesses in standard numerical methods. That…...
Helium atoms generate X-rays nearly twice the expected energy limit
3+ week, 5+ day ago (690+ words) Helium X-ray high-harmonic generation reaches 280 eV as correlated electrons appear to break the conventional energy cutoff. (CREDIT: U Wien) The result challenges the standard picture of high-order harmonic generation, or HHG, a process that converts laser light into coherent extreme-ultraviolet…...
Spacecraft may be mistaking how energetic particles move around the Earth
3+ week, 5+ day ago (850+ words) Radiation belt particle diffusion may be mimicked by predictable particle motion that spacecraft cannot fully resolve. (CREDIT: Shutterstock) High-energy particles trapped in Earth’s radiation belts can look as if they are spreading randomly, even when their motion is fully predictable....
Scientists detect key process that triggers new star formation
3+ week, 6+ day ago (1389+ words) A new study captures the first clear evidence of ambipolar diffusion, a process that allows stars to form from dense cosmic clouds. (CREDIT: Shutterstock) Deep within a dark cloud in the constellation Taurus, a quiet shift is taking place. It…...