NASA Pushes for Nuclear-Powered Space Missions
The space agency’s Kilopower project could end a half-century hiatus for U.S. reactors in space
Stories by Harrison Tasoff
Bizarre Supernova Defies Understanding
Supernovas are thought to be the explosive deaths of stars. So what happens when one is found repeating?
Bizarre Dwarf Planet Haumea Has Rings
A rare stellar alignment allowed scientists to determine the world’s size and shape—and to discover its rings
