Earth likely formed from inner Solar System material alone, raising fresh questions about the origin of water on our planet.

For years, planetary scientists have argued that some of the material that built Earth must have drifted in from beyond ...

The crew members of the nine Apollo missions to the Moon remain, to this day, the farthest-flung human beings in history. The Moon is, on average, 250,000 miles (400,000km) from the surface of the ...

NASA’s Perseverance rover has detected nickel concentrations in Martian bedrock that far exceed what geologists would expect ...