Planetary Science

Why did matter outlast antimatter? And clumps of cells can learn and remember

The edge of the world is closer than you think, and simple geometry proves it

NASA’s Mars Sample Return program is the agency’s highest priority in planetary science, but projected multibillion-dollar overruns have some calling the plan a “dumpster fire”

A new analysis finds that images from Voyager 2's close encounter with Neptune show the planet as being far too blue

The James Webb Space Telescope caught its second glimpse of the year of Uranus and its bright-shining rings

Mars Sample Return has always been an expensive, high-risk, high-reward project. But now, with realization of the mission’s actual cost and expanding timeline, Congress must commit to fully supporting the effort or risk tanking the rest of NASA’s planetary science program

Six “sub-Neptune” worlds locked in a delicate dance around a nearby star offer fresh insights for the orbital evolution of planetary systems

The best-yet map of active volcanoes on Jupiter’s moon Io hints at a hidden magma ocean—and more

Amid uncertainty over space agencies’ plans for future Venus exploration, enthusiasm for a private-sector mission grows

The Lucy spacecraft’s encounter with asteroid Dinkinesh has revealed a bizarre “contact binary” double-moon companion

NASA’s Lucy mission flew past an asteroid nicknamed Dinky, only to discover an even smaller space rock orbiting it

Fine particles kicked up by the Chicxulub asteroid impact could have blocked out the sun for years, resulting in global cooling and disastrous consequences for ecosystems