Empirical Earth · The Sky — Sun, Moon & Stars

Does light just “run out”?

The claim

“Light can’t travel forever, so distant stars can’t be real.”

What is measured

Light does not expire in vacuum; it only spreads thinner as 1/r², which bigger telescopes and longer exposures overcome. We detect galaxies billions of light-years away, the opposite of light that “can’t travel far.”

What would show this is wrong

a demonstration that light loses energy and stops in empty vacuum at some fixed range, independent of absorption by intervening matter.

Sources

  1. Inverse-square law & solar irradiance. Radiated intensity falls as 1/r²; solar irradiance is ~1,367 W/m² at 1 AU (Earth) versus ~9,126 W/m² at Mercury (0.387 AU) — the threefold-closer dista link
  2. Deep-field imaging & cosmic distances. Long-exposure deep fields record galaxies whose light has traveled over 13 billion years; light spreads (inverse-square) and redshifts but does not dec link
  3. JWST’s most distant confirmed galaxy. In 2024 NASA’s James Webb Space Telescope spectroscopically confirmed JADES-GS-z14-0 at redshift z ≈ 14.3 — seen as it was roughly 290 million years aft link
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