A Caltech-led analysis of data from NASA's James Webb Space Telescope has revealed that Neptune's enigmatic moon Nereid may be the last remaining witness to a violent planetary upheaval billions of years ago. The research, published May 20, 2026, suggests Nereid originated near Neptune itself

NASA has pushed rotor blade technology into supersonic flight during ground testing of its next-generation Mars helicopter, clearing a major engineering hurdle for a fleet of aircraft designed to scout terrain and support future crewed missions on the Red Planet. The achievement marks a decisive step beyond Ingenuity, the

The world's first space-based neutrino detector reached orbital altitude in May 2026, marking a fundamental shift in how scientists observe some of the universe's most energetic events. The observatory will capture neutrinos -- ghostly particles that pass through virtually all matter -- from a vantage point no

NASA's Psyche spacecraft will execute a high-risk gravity assist flyby of Mars on May 15, 2026, passing within 2,800 miles of the planet's surface -- a margin so tight it will thread between the orbits of both Martian moons. The maneuver is essential to redirect

After five years of observation, the Dark Energy Spectroscopic Instrument has completed the largest three-dimensional map of the universe ever constructed -- and the early findings suggest the force driving cosmic expansion may not be constant, challenging a cornerstone assumption of modern physics. The discovery could reshape how scientists understand