Solar Noon Longitude Challenge

Solar noon is an excellent claim-lab topic because it is predictable, repeatable, and independent of space imagery. Longitudes do not all face the Sun at the same time.

The Challenge

Choose two cities with very different longitudes. Before checking an almanac, predict the approximate solar-noon offset using 15 degrees per hour. Then compare with USNO or another almanac source.

Why This Beats Clock Arguments

Time zones are political. Solar noon is physical. A government can redraw a time-zone boundary, but it cannot make the Sun reach its highest point in New York and London at the same moment.