WASHINGTON — NASA’s deputy administrator says there is nearly unanimous support for its low Earth orbit microgravity strategy that endorses keeping humans in orbit continuously during the transition to commercial space stations. NASA released Dec. 16 a final version of LEO Microgravity Strategy that backed a concept called “continuous heartbeat” by the agency, which calls for maintaining humans in LEO continuously as NASA shifts from the International Space Station to commercial stations. NASA had been weighing continuous heartbeat against an alternative called “continuous capability” that retained the ability to send…
