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 ...
Our solar system's famous "invader" might be as old as the Milky Way itself.
A NASA satellite’s camera captured the far side of the Moon as it passed in front of Earth. Credit: NASA/NOAA. Curiosity draws us to the cosmos, and as a planetary scientist, I ...