Next week will use a previously-flown Falcon 9 booster, and the ultimate two Iridium Next missions will fly on new Block 5 boosters. This could be the tenth launch for SpaceX in 2018. May 22 Falcon 9 Iridium Next 51-55 & GRACE Follow-On Launch time: 1947:58 GMT (3:47:58 p.m. EDT; 12:47:58 p.m. PDT) Launch web site: SLC-4E, Vandenberg Air Force Base, California A SpaceX Falcon 9 rocket will launch 5 satellites for the Iridium subsequent cell communications fleet and two Gravity Recovery and Climate Experiment Follow-On (GRACE Follow-On) satellites for NASA and the German Research Centre for Geosciences (GFZ). The Falcon

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