"The earth is flat, being borne upon air, and similarly the sun, moon and the other heavenly bodies … ride upon the air through their flatness." —Hippolytus
Hippolytus didn't know betterMESSENGER is the name of the NASA mission to explore the planet Mercury with a wee spaceship.
What have they discovered?Ovid wrote that the Roman god Mercury brought dreams from the gods to sleeping humans.
What does the planet Mercury do?The Mercury MESSENGER project is just one of NASA's many missions.
Learn about other missions