Researchers at Cornell University have assembled a shortlist of rocky exoplanets sitting inside their stars’ habitable zones, ranking them as plausible destinations for an interstellar probe that ...

It takes a bold person to declare that interstellar travel is now within our grasp. Physicist Stephen Hawking has shown that he is just that, taking part in the Breakthrough Starshot initiative. The ...

Physics sets unforgiving limits on how fast anything can move, yet the same laws also leave surprising room for creative ways to cross the gulf between stars. The real question is not whether the ...