Is the Earth flat?
No — the evidence does not support this claim.
The Earth is flat.
What the evidence shows
The Earth is an oblate spheroid, confirmed by centuries of observation and by direct evidence from spaceflight. Satellite imagery, circumnavigation, the way ships disappear hull-first over the horizon, and the physics of gravity all establish that the planet is round. No credible evidence supports a flat Earth.
This summary describes a fact-check originally published by NASA. FactGuard did not conduct this review; we summarize it and link to the original. Read the original fact-check by NASA →
Sources
- NASA
- Apollo 17 'Blue Marble' imagery
- National Geographic
Published 2026-06-07 · Last reviewed 2026-06-07
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