How the 47-year-old Voyager spacecraft are still exploring space

Voyager 1 and 2 probes have been on a remarkable journey since their launch in 1977 .

They are the most distant man-made objects in the universe, and are still going 47 years after they first left Earth .

Keeping the old technology running for this long hasn't been easy, though.

The probes have had their share of computer glitches to deal with.