When the Webb Space Telescope successfully launched from Earth on Saturday, most everyone was just relieved that it didn’t blow up in the process. But now there’s even better news: The launch was precise enough that the spacecraft may have enough propellant to continue its scientific...

The upcoming James Webb Space Telescope, already seven years behind schedule, will not launch on Halloween as planned, which is just as well, given the ominous date and this project’s history of bad luck. For once, the delay is not due to the telescope, but rather the rocket that will deliver it...