Chronoscope

The Chronoscope allows you to peer back in time.
Just set the coordinates and activate the viewer bridge.
The probe manifests in the past as a small bubble for an infinitely brief period of time.
For safety reasons, the probe cannot scroll forward or backward in time.
This would risk damaging the probe, which would flash forward in time as a catastrophic energy wave.
I show my students so many historical moments, but most of all, they want to see trees and grass and rivers.
Back before the energy wave burned the world, while we watched from Lunar Base One.