A spent Falcon 9 stage is predicted to hit the Moon at roughly 5,400 mph. The known mass and trajectory give scientists an unusual impact experiment.

A Falcon 9 upper stage is expected to strike near Einstein Crater on August 5. Here is where the predicted impact lies and why it will be difficult to observe.

A spent Falcon 9 upper stage is predicted to strike near Einstein Crater on August 5, 2026. Here is what researchers expect to observe.