At the ragged frontier where the Sun’s influence gives way to the galaxy, a decades‑old spacecraft has stumbled into a furnace that theory did not predict. As Voyager pushes through the heliopause, ...

Contrary to its name, Voyager 2 was the first of the vehicles launched into space first in Aug. 20 1977 from Florida. Its twin probe, Voyager 1, launched two weeks later on Sept. 5. At more than 15 ...