Launched in 1977, the Voyager space probes are further from Earth than any human-made object ever built. Using the Hubble Space Telescope, astronomers have charted a roadmap for the probes, revealing surprising details about their ongoing journey through interstellar space.
Incredible as it may seem, both Voyager probes are still collecting data and transmitting their findings back to Earth. They’ve got about a few decades of electrical power left, after which time they’ll go dark. In the meantime, scientists can study the information collected by the Voyagers, and compare these findings to data gleaned by the Hubble Space Telescope. But even after Voyager 1 and 2 expire, astronomers can still use Hubble to study the environment through which these dead probes are expected to sail.