Ghost Lights or Alien Tech? Signals from Beyond the Grave or Beyond the Solar System? Here’s the scene. You’re driving down a secluded road. The only lights come from your headlights.

Firefly Aerospace’s Blue Ghost lander fell silent over the weekend, wrapping up two weeks of science experiments for NASA.

The light is referred to as a “ghost light,” and some theater people will insist that the purpose of this light is to keep the spirits at bay, or happy, or whatever the local thespians decide ...