JWST
The telescope assembly for the James Webb Space Telescope being moved inside a clean room at the Goddard Space Flight Center after completing vibration and acoustic tests.

As NASA commits to performing another cost and schedule estimate for the James Webb Space Telescope, the chairman of an independent review board said he’s concerned about its ability to remain on track for a launch in two years.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...