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Researchers reconstructed a December 2024 solar eruption from the records of 17 spacecraft across the inner solar system and found a component that traveled toward Earth invisible from the Sun-Earth…
NOAA's Space Weather Prediction Center (SWPC) has flagged a G2, or moderate, geomagnetic storm for roughly July 3, after two coronal mass ejections (vast clouds of solar plasma and magnetic field)…
A single glancing impact by a 320-meter asteroid can account for both the 10-kilometer-wide depression at Deimos's south pole and the fine debris covering the whole 12-kilometer moon, according to…
Radar waves at a wavelength of 3.5 centimeters penetrate no more than about 32 meters into Europa's surface, according to a bound reported by Tunhui Xie, Jean-Luc Margot and six co-authors from 13…
NASA's Lunar Reconnaissance Orbiter has photographed the crater left when a spent Falcon 9 upper stage struck the Moon on Aug. 5. The crater measures about 60 feet across. The orbiter imaged the site…
For decades the recipe for an aurora seemed to demand something Mars simply does not have: a planet-sized magnetic field. Earth's aurora is fed by one. So is Jupiter's, and Saturn's. Mars lost its…
Earth has almost no memory of its own violent childhood. Plate tectonics keeps recycling the crust, erasing the scars of the asteroid barrage that battered every young world in the inner Solar…
Every so often a meteorite punches through the dust of the Martian midlatitudes and leaves something startling behind: a splash of bright white ice at the bottom of a fresh crater, visible from orbit…
Ryleigh Davis was not looking for clay. She and her colleagues at Caltech had aimed the James Webb Space Telescope at Neptune's rings and three of its small inner moons to answer a plainer question:…
Kallichore is not the kind of moon that makes it onto posters. Less than four kilometers across, it circles Jupiter at hundreds of millions of kilometers from Earth, one of dozens of small, dark…
For most of its life, an interstellar comet is a frozen relic drifting between the stars, its ices locked solid in the cold. Then it falls toward a sun that isn't its own and starts to breathe.…