This was new to me, and it makes me feel better (Only ten years? Great that they still have enough fuel for twenty years! Oh, so it isn't useless after that? Even better!):<p>> When its tank gets low, engineers might command the observatory to push itself into a higher orbit, to make sure it doesn’t crash into any objects closer to home. If that happens, Webb could remain in orbit around the sun for hundreds, maybe thousands of years. It would no longer be yoked to the Earth in the same way, but its mirrors and scientific instruments could keep working, and Webb could still phone home, Yu said.