Tiny, Explosive ‘Jetlets’ Might Be Fueling the Solar Wind
Scientists investigated a weird feature in Parker Solar Probe data—and may have discovered what drives the plasma that pervades the solar system.
At Last, the Milky Way Gets a Better Close Up
The largest catalog ever collected by a single telescope maps Earth’s 3 billion stellar neighbors—and helps track the dust that warps how we see them.
Did the Seeds of Life Ride to Earth Inside an Asteroid?
Biological amino acids could have celestial or terrestrial roots. An experiment simulated their formation in deep space—but the mystery isn’t solved yet.