An unusual concentration of impact craters suggests that they may have been caused by the breakup of an asteroid that created a temporary debris ring around Earth.
Space & Planets
Posted inResearch Spotlights
Audible Storm Waves Could Turbocharge Earth’s Radiation Belts
Electromagnetic chorus waves could generate more extreme radiation levels than previously thought, posing severe hazards for Earth-orbiting spacecraft.
Posted inEditors' Highlights
Timing the Global Expansion on the Moon
A new analysis of the relation between randomly oriented linear gravity anomalies and two large craters on the Moon implies that the gravity anomalies formed over a long period of time.
Posted inNews
Clipper Sets Sail for an Ocean Millions of Miles Away
Europa Clipper will assess whether Jupiter’s moon has the right ingredients to host life, and could illuminate the mysteries of icy worlds throughout the solar system.
Posted inResearch Spotlights
How Did Magma Oceans Evolve on Early Earth and Mars?
New insights into the early timelines of rocky planets are emerging, thanks to clues from iron chemistry and primordial atmospheres.
Posted inNews
ALMA Watches the Surface of a Star “Boil”
Observations of R Doradus, a nearby red giant, provide the first timescale for convection on the surface of any star other than the Sun.
Posted inResearch Spotlights
Fifteen Years Later, Scientists Locate a Lunar Impact Site
The impact crater from NASA’s LCROSS mission lies hidden in an eternally dark region of the Moon.
Posted inResearch Spotlights
The Moon’s Tides Hint at a Melty Lunar Layer
New lunar gravity measurements support the idea that a partially molten mantle layer is sandwiched between the rest of the Moon’s mantle and its core.
Posted inNews
These Five Craters May Have Birthed a Third of Martian Meteorites
Researchers have homed in on five craters on the Red Planet that are the likely sources of Martian meteorites.