#ICYMI: Lifting off early Saturday morning atop a @ULALaunch #DeltaII rocket, @NASA_ICE's #ICESat2 is safely on orbit and ready to embark on its mission to measure the ice of Earth’s frozen reaches with unprecedented accuracy. Learn more: https://www.nasa.gov/press-release/nasa-ula-launch-mission-to-track-earths-changing-ice?utm_source=TWITTER&utm_medium=NASA&utm_campaign=NASASocial&linkId=56916170