Plutonium discovered at the bottom of the ocean was found to be refuse from a kilonova that exploded close to Earth 10 million years ago. Kilonovas occur when binary neutron stars spiral closer ...

More on Plutonium-238: How the U.S. Tested the Safety ... took the first images of Jupiter's rings, discovered many of the moons circling those planets and revealed that Jupiter's moon Io has ...

and the Cassini spacecraft that is currently sending back images of Saturn's rings and moons. Spacecraft powered by plutonium-238 have revealed odd wonders of the solar system, like volcanoes on ...

Workers have begun laying the groundwork for the first production later this year of plutonium “pits” — hollow spheres the size of a half grapefruit, made from the rare chemical element.

The plutonium that will be blasting off the planet ... probes and the Cassini spacecraft that dived through Saturn's rings.) Perseverance's MMRTG is designed to produce 110 watts of power, about ...

WASHINGTON – A half-metric ton of weapons-grade plutonium secretly shipped into Nevada has been removed four years early under federal court order and an agreement reached by U.S. Sen.