Nicolaus Copernicus
Astronomer
Discoveries
Nicolaus Copernicus discovered that the planets instead revolved around the sun.
Date of the discovery
Nicolaus Copernicus discovered in the early 1500's.
Technology used at the time
Nicolaus Copernicus use a astrolabe, paralactic instrument and a solarquadrant.Telescopes weren't invented yet.
Contribution
Nicolaus Copernicus changed the way of thinking, not only astrononically but also religiously.