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.
Launch & Exploration: NASA's Voyager 1 spacecraft was launched in September 1977 and flew by Jupiter and Saturn before continuing on toward interstellar space. NASA's Voyager 2 spacecraft also flew by Jupiter and Saturn and went on to explore Uranus and Neptune.