
344 steps stood between the James Webb Space Telescope and total failure — any one could have ended it — and the telescope that survived them all now runs on less power than a household kettle, a million miles from Earth
Webb launched with 344 single points of failure, most tied to a deployment that could not be repaired at L2. It cleared them all. Today it runs on about one kilowatt, less than many kettles, kept cold passively by its sunshield, a million miles from Earth.

