The universe is vast and our journey to understand it has just begun.

That bright “Evening Star” visible in the west each night since January has vanished. Venus has been a staple of the post-sunset night sky all year, but today it finally disappears into the ...

Earth ejecta, for instance, could hold Earth life. "We're trying to figure out how much mass is reaching Venus from Earth, and how many cells can that mass carry," Emma Guinan, first author of a ...