Scientists have revealed that the "tsunami wave" that NASA's Voyager 1 spacecraft began experiencing earlier this year is still propagating outward.
NASA`s Voyager 1 spacecraft has already entered interstellar space, according to reports.
Two of three key signs of changes expected to occur at the boundary of interstellar space have changed faster than at any other time in the last seven years.
President Barack Obama's speech at Siri Fort auditorium
Day in Pics: 27th January
Showbiz World - January 27, 2015