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Based the conclusions [pdf] of an Independent Review Board (IRB), NASA has once again delayed the launch of the James Webb Space Telescope, now set for 2021, while increasing its construction budget from $8 billion to almost $9 billion.
In its report, the IRB found that technical issues, including human errors, have greatly impacted the development schedule.
The agency previously had estimated an earlier launch date, but awaited findings from the IRB before making a final determination and considered data from Webb’s Standing Review Board. The agency established the new launch date estimate [March 30, 2021] to accommodate changes in the schedule due to environmental testing and work performance challenges by Northrop Grumman on the spacecraft’s sunshield and propulsion system. The telescope’s new total lifecycle cost, to support the revised launch date, is estimated at $9.66 billion; its new development cost estimate is $8.8 billion.
It is important to remember that Webb was originally supposed to cost $1 billion, and launch in 2011. It is now a decade behind schedule, with a cost almost ten times higher.
It really does appear like SLS and Webb are in a race to see who can get launched last. And right now, the race is neck and neck.
I should add that if the launch gets delayed much more, NASA will have further problems with the launch rocket. The Ariane 5 rocket, designated as the launch vehicle, is being retired around 2021. Beyond that date there might be problems using one.