An artist's concept of the Space Launch System rocket ascending through the clouds. (credit: NASA)
Almost from the inception of NASA’s large and costly rocket program, the Space Launch System, aerospace engineers have questioned the viability of a rocket that will fly infrequently, perhaps as little as once every two to four years. The most influential body to review the rocket, the National Research Council, concluded in 2014 that such low flight rates “will not be sustainable over the course of an exploration pathway that spans decades.”
NASA has steadfastly maintained that it will be able to fly the SLS rocket on an annual basis. However, on Tuesday, the website NASA Spaceflight.com reported on an “all hands” meeting at Kennedy Space Center in Florida where Robert Lightfoot, the agency’s top civil servant, addressed employees. According to the report, NASA officials explained during the meeting that the SLS lacks “booked missions at this time due to tight funding.”
Essentially this appeared to be an acknowledgement by NASA that it lacks funding to build payloads for its flagship rocket, largely because it is spending so much time and money building that rocket. This has been a main contention of SLS critics, who have said it gobbles up so much of the agency’s budget that NASA cannot afford to use it. For this reason the SLS has been derided as a “rocket to nowhere.”
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