Voyager may not have entered interstellar space, after all

Two scientists argue that probe is still in solar bubble

IN OR OUT?  NASA claims that Voyager 1, seen in an illustration, reached interstellar space in August 2012. But a new paper argues that the probe remains within the solar bubble.

JPL-Caltech/NASA

Nearly a year after NASA trumpeted Voyager 1’s departure from the sun’s protective bubble, two mission scientists argue that the spacecraft never left.