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Image shows a sketch of the Earth on graph paper with a photo of the Earth in the background. Blue arrows point to the sketch and the word "FAKE?" appears above in red letters.

How do we know the Earth is round?

Earth is round, but flat-earthers still exist.
Encyclopædia Britannica, Inc.
  • Encyclopædia Britannica, Inc.
    Jolly Ol' Nick is a man with many names.
    Was Santa Claus a Real Person?
    Santa Claus reading a book in front of a Christmas tree.
  • Encyclopædia Britannica, Inc.
    How did a Christian holiday get scrambled up with colored eggs?
    What Do Eggs Have To Do With Easter?
    Illustration of Jesus Christ with a radiant halo, surrounded by colorful, patterned Easter eggs, symbolizing the connection between Easter eggs and the Christian holiday.
  • Encyclopædia Britannica, Inc.
    Learn more about the life of American evangelist and social reformer Sojourner Truth.
    Why Sojourner Truth Changed Her Name
    Why Sojourner Truth Changed Her Name
  • © MinutePhysics (A Britannica Publishing Partner)
    Learn about Albert Einstein's theory of Brownian motion and how he derived the size of atoms.
    Albert Einstein's Theory of Brownian Motion
    Diagram illustrating Brownian motion, showing red and brown circles representing particles above and below a blue wavy line, with many small gray dots symbolizing atoms.
  • JPL/NASA
    Learn about dwarf planets.
    Learn about the dwarf planets within our solar system
    Learn about the dwarf planets within our solar system
  • © MinutePhysics (A Britannica Publishing Partner)
    A brief lesson on the gravitational effects of dark matter.
    Learn about dark matter and its gravitational effects
    Learn about dark matter and its gravitational effects
  • © MinutePhysics (A Britannica Publishing Partner)
    Ten reasons why Earth is round.
    Know the ten interesting facts that prove the earth is round
    Know the ten interesting facts that prove the earth is round
Related Articles: ellipsoid , geodesy , geoid , globe , conspiracy theory , spherical Earth , flat Earth , Why Are Planets Round?