
NASA this month successfully completed the exploration upper stage (EUS) preliminary design review (PDR) for its Space Launch System (SLS) rocket, according to an agency statement.The PDR kicked off Nov. 30 with approximately 500 experts from across NASA and industry assessing more than 320 items on the EUS, including documents and data. The PDR board was completed Jan. 19 with the board voting unanimously that the EUS is ready to move to the critical design review (CDR) phase. CDR, the…