May i know how the Voyager 1 spacecraft can still sent the signal at 16.976 billion km from earth out of the Solar System
and the power supply can stay until 33 years since lunch at September 5, 1977 33 years ago
it is very Geat ...

at http://en.wikipedia.org/wiki/Heliopause
see that Voyager 1 spacecraft is on bow shock area and
will pass to heliopause and solar wind that will damage our spacecraft

I think the voyager1 is already pass what that what we need to see, may be already pass the alien spacecraft .. the problem the probe only have black and white low resolution Camera that is 1977 camera technology .. and the signal transfer speed it very low- i cannot fine howmuch kbps the transfer speed.. if we need to sent a new probe need another 33years to reach there.. unless have a rocket boster.. but need a lot fuel