Trending: Now you can put your name on NASA’s Mars 2020 rover (in teeny tiny letters)

Will it fly on 2019 or 2020? NASA’s latest schedule for the maiden launch of its heavy-lift Space Launch System rocket has it both ways. Today the space agency said June 2020 is now the official time frame for Exploration Mission-1, or EM-1, which would send the SLS and NASA’s Orion capsule on an uncrewed trip beyond lunar orbit and back. But in an SLS status update, NASA Acting Administrator Robert Lightfoot said a December 2019 date is still possible if planners address the manufacturing and production schedule risks that were identified during a review of the project.

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