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]
Mission Objective. The mission objective of the Voyager Interstellar Mission (VIM) is to extend the NASA exploration of the solar system beyond the neighborhood of the outer planets to the outer limits of the Sun's sphere of influence, and possibly beyond.
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.