OBJECTIVE: VOYAGER 2 IS THE ONLY SPACECRAFT TO HAVE VISITED NEPTUNE WITH A 1989 FLYBY AND SO THE ONLY IN SITU MEASUREMENTS OF THE PLANET S MAGNETOSPHERE COME FROM ABOUT TWELVE HOURS AROUND VOYAGER 2 S CLOSEST APPROACH TO THE PLANET. THE COSMIC RAY
$72,790FY2020National Aeronautics and Space AdministrationNASA
The Aerospace Corporation