Add Yahoo as a preferred source to see more of our stories on Google. Voyager 1’s signal now takes nearly a full day to reach Earth as it pushes farther into the vast unknown of interstellar space. | ...

A space telescope built to study distant galaxies has unexpectedly discovered a comet about 810 million miles from Earth. The ...

Human deep-space exploration has a brand-new, ultra-fast pipeline to home. In a new interplanetary optics development, Chinese scientists have officially bridged the 400,000-kilometer (248, 548 miles) ...

In the silent, freezing expanse of interstellar space, a small spacecraft launched in the era of disco and analog tape has just achieved a feat once thought to belong only to science fiction. NASA’s ...