Renaissance+and+Reformation+Science

Christopher Columbus was a famous explorer and he needed to sail across vast oceans, so he needed navigational equipment. The sailors used a magnetic compass to keep track of the direction of the ship. This was called the astrolabe. The astrolabe made it possible to keep track of the ship's positionby comparing its position to the stars.
 * **Astrolabe** ||
 * [[image:http://www.sunymaritime.edu/stephenblucelibrary/images/astrolabe_5.jpg.jpg width="242" height="247"]] ||