Published online 16 November 2010 | Nature 468, 353-354 (2010) | doi:10.1038/468353a


Scope sails into budget void

An independent review finds NASA's flagship James Webb observatory is perilously overspent.

The first of 18 gold-coated, hexagonal mirror segments destined for the James Webb Space Telescope undergoes cryogenic testing.NASA/MSFC/E. Given

At least no one says it won't work. But that may be the only consolation for NASA administrators as they absorb the implications of a scathing report detailing the budget woes of the James Webb Space Telescope (JWST).

Intended to replace the Hubble Space Tele­scope, the JWST was estimated to cost US$1 billion in 2001, but by the time the project received its official go-ahead in 2008, its growing complexity had pushed that figure up to $5 billion. Now an independent review, released on 10 November, has found that the telescope's true price tag is at least $6.5 billion, and that its target launch date has slipped by more than a year to September 2015.

The staggering overrun means that the JWST will have to commandeer vast and un­expected resources, amounting to hundreds of millions of additional dollars per year, to stay on track, officials admitted at a news briefing held to coincide with the report's release. This will undoubtedly have an impact on other projects, first within the affected astrophysics community, then the NASA science programme, and then across the entire agency, said Chris Scolese, associate administrator at NASA headquarters in Washington DC.

The review, commissioned in June by Senator Barbara Mikulski (Democrat, Maryland) and led by John Casani, an engineer at the Jet Propulsion Laboratory in Pasadena, California, also recommended an administrative re­organization of the project, to which NASA has already acceded. Richard Howard, NASA's deputy chief technologist, will become manager of a new JWST project office based at NASA headquarters, rather than at the Goddard Spaceflight Center in Greenbelt, Maryland, which has been the project's home until now. Howard's first step will be to develop a realistic budget for the JWST, expected by February 2011.

"We do not want to have any more surprises in this programme," Howard told journalists at the briefing.

The report found that the JWST budget presented to NASA in 2008 "was not based upon a current, bottom-up estimate of projected costs" and therefore understated the project's real requirements. The agency also had inadequate monetary reserves each year to cover expenses that arose when costs turned out to be higher than estimated. NASA dealt with the problem by continually postponing necessary work so that it would fall under a subsequent year's budget, with the delay causing the work to double or triple in price.

The report admonishes NASA managers, saying that they were aware of the practice of deferring work into future years and "tacitly condoned it". For some, the findings are evidence that the agency has not got to grips with its tendency to allow programmes to overrun their budgets, which inevitably means that money is siphoned from other projects. "We seem to be better at observing lessons, rather than learning from them," says Matt Mountain, director of the Space Telescope Science Institute in Baltimore, Maryland.

The JWST will need about $250 million per year of extra funds in 2011 and 2012, and such estimates represent the minimum, says Casani. Given that the newly elected Congress wants to reduce spending, the extra funds might be unavailable and the launch date would have to be postponed, driving up costs still further, he adds.

The grim outlook limits NASA's ability to carry out recommendations from the Astro2010 decadal survey, a community-wide effort to assign priorities to major projects, says Alan Stern, a planetary scientist at the Southwest Research Institute in San Antonio, Texas.


"It seems that there was no need for NASA to participate in the decadal, as there are unlikely to be any funds available before 2020 to start anything big and new," says Alan Boss, chair of the NASA advisory council astrophysics subcommittee and an astrophysicist at the Carnegie Institution for Science in Washington DC. Particularly vulnerable, says Stern, is the Wide-Field Infrared Survey Telescope (WFIRST), the decadal survey's top large-scale, space-based project. The mission, intended to study the 'dark energy' driving the acceleration of the Universe's expansion, is estimated to cost $1.6 billion.

Despite its dysfunctional financing, the JWST is technically sound and should still proceed, the report finds, a view widely shared in the community. Mountain points out that it required nearly $6 billion in today's dollars to get the Hubble telescope working as it was intended, and few would argue that the money wasn't well spent.

"It's good to do one hard project a decade; it reminds us what revolutionary things look like," he says. 


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  • #60843

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