For nearly five decades, NASA's twin Voyager probes have plumbed the cosmos in search of answers to some of astronomy's most perplexing mysteries about our solar system and its place in the wider ...

And half of the 50 years, NASA Voyager 1 has spent billions of miles traveling into interstellar space. In October, it went through a complete communication blackout; now, after weeks of quietness, ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The 47-year-old ...