To scientists, asteroids are cosmic time capsules. They’ve remained mostly unchanged since the solar system’s birth, making them perfect subjects for understanding how planets—and even life—came to be ...

“Confirming a non-universal X-ray-to-ultraviolet relation with cosmic time is quite surprising and challenges our understanding of how supermassive black holes grow and radiate,” says Dr. Antonis ...

Hubble’s crystal-clear look at NGC 1786—an ancient globular cluster tucked inside the Large Magellanic Cloud—pulls us 160,000 light-years from Earth and straight into a cosmic time machine. Packed ...