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 ...

“There is a silence in the night sky that has bothered me for as long as I can remember.” That observation, attributed to American physicist Richard Feynman, captures a tension many people feel when ...

AUSTIN (KXAN) — Exploring beyond our solar system could have lasting impacts here on Earth, and scientists, creatives and industry experts gather at the University of Texas at Austin this week to ...

Engineers are developing a concept for interstellar travel using a swarm of 1,000 ultra-light "laser sails." The mission aims to send these sails to Proxima b, an exoplanet 4.25 light-years away, ...

“The whole thing is very hypothetical at this point,” Stephen Hsu said of wormholes, a caution that still defines the subject even as the idea keeps resurfacing in serious physics. The appeal is ...

Add Yahoo as a preferred source to see more of our stories on Google. Five physical barriers may prevent civilizations from ever meeting, from light speed limits to cosmic timing gaps. (CREDIT: ...