Astronomy & Space news

Silence in the sky—but why?

(Phys.org) —Scientists as eminent as Stephen Hawking and Carl Sagan have long believed that humans will one day colonise the universe. But how easy would it be, why would we want to, and why haven't we ...

Aug 26, 2013 4.2 / 5 (71) 213 | with audio podcast

Was Einstein Wrong about Space Travel?

Consider a pair of brothers, identical twins. One gets a job as an astronaut and rockets into deep space. The other stays on Earth. When the traveling twin returns home, he discovers he's younger than his brother.

Mar 22, 2006 3.6 / 5 (81) 0