Scientific discovery

  There are many scientific discoveries in the world. But I think "Heliocentrism"is the greatest scientific discovery,because it is important for the human.

  In 1543, Nicolaus Copernicus who was from poland made this discovery. Heliocentrism is a 16th century polish scholar who proposed that Earth orbits the sun(rather than that everything orbits Earth)and that Earth turns on its own axis.These ideas may seem obvious now,but in 16th century Europe, they were revolutionary.

   He couldn't conduct any experiment because the technology wasn't available.Without telescope,Without computer.Only through long-term observation records, he lookes up at the sky every night.With simple tools, he detailed records for each planet position and the offset angle.

   I think this discovery is very important for the human,because this discovery changed the foundation of astronomy.It let us know how the Earth was running.