Voyager 1 has been traveling through space since 1977, and some scientists hoped it could keep sending back science data for 50 years. But a serious glitch has put that milestone in jeopardy.
The theoretical physicist is part of a team that wants to send postage-stamp-size probes to our closest star system, Alpha Centauri. But can they get the proper permits?
The Voyager spacecraft revolutionized our understanding of space. In a new book, The Interstellar Age, planetary scientist Jim Bell shares stories about the planning and excitement back on Earth.
For the past decade or so, scientists have been waiting for the Voyager 1 spacecraft to cross into deep space. New research suggests it already has — over a year ago.