Voyager 1 Has Left The Solar System
Voyager 1 One of the two identical Voyager probes, as photographed by NASA. NASA After 36 years, we can wave goodbye to our pal. 36 years after launch, Voyager 1 has officially left the solar system, according to NASA officials. We've been waiting for years for Voyager to break through the last boundary of the heliosphere, which is the region of space which particles spurted out by our sun can reach (roughly corresponding to our understanding of our own solar system). Voyager is the very first manmade object to break its way through the heliosphere, on its way out to a distant star. NASA estimates that it'll get near to its destination star in about 40,000 years. (Yeah, space is pretty big.) The border of the heliosphere isn't visible; it's not like breaking through the tape at the end of a marathon and knowing you're finished and on the other side. NASA measures...