After much tinkering, Northrop Grumman Aerospace Systems has at last finished the cryogenic cooler that will keep JWST's Mid-Infrared Instrument at its frosty-cool operating temperature of minus 270 Celsius.

NASA announced yet another launch delay for the James Webb Space Telescope June 27, pushing the flagship observatory’s launch to no earlier than late March 2021 while breaking a cost cap set by Congress.

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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...