Put a sky claim in context.
Compare a claimed Sun or Moon position with an approximate ephemeris at a supplied place and UTC time.
check_ephemerisTry the real call 01 / UNDERSTAND THE METHOD
ILLUSTRATION · NOT A CALCULATIONSee what the tool does.
INTERACTIVE 3D / METHOD STUDYExplore the method in space.
A teaching illustration. Run the tool below to obtain a native calculation.Drag to inspect · arrow keys move the camera · no MCP call
KNOW WHAT THE RESULT MEANS
Useful evidence needs boundaries.
- The model margin is conventional, not an independently certified accuracy guarantee.
- Altitude, atmosphere and observation-time uncertainty matter, especially near the horizon.
- This is a consistency check, not precision navigation or evidence that a photograph is authentic.