The discovery of an 11th-century Islamic astrolabe in Verona, Italy, has captivated historians and scientists alike. With ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

If you’re lucky—for a sufficiently broad definition of “lucky”—you’ll materialize over the surface of a star (or inside one) ...