Support WBURNASA Launching New Satellites To Measure Earth's Lumpy GravityPlay03:45Download AudioChristopher JoyceMay 21, 2018 ShareThe Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission, shown in an artist's rendering, will measure tiny fluctuations in Earth's gravitational field to show how water moves around the planet. (NASA/JPL)
