Hydranencephaly or hydrancephaly [1] is a condition in which the brain's cerebral hemispheres are absent to varying degrees and the remaining cranial cavity is filled with cerebrospinal fluid.[2]
JPL built and operates the twin Voyager spacecraft. The Voyagers Interstellar Mission is a part of NASA's Heliophysics System Observatory, sponsored by the Heliophysics Division of NASA's Science Mission Directorate in Washington.
Reports last year that NASA's Voyager 1 spacecraft had left the solar system and entered interstellar space were a bit premature -- but the moment is close, BBC News reports. New data indicates that, 36 years after it blasted off from Earth, the pace probe is right at the precipice of deep space.