FIRST CONTACTS 28000 BCE 1821 CE
THE COLUMBIAN EXCHANGE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Compass
|
|
|
Astrolabe
|
|
|
GPS
|
|
|
Triangular sails
|
Detailed explanation-1: -The mariner’s astrolabe was an important navigational tool for finding latitude. It is a simplified version of the traditional astrolabe – an instrument that could help tell time, find altitude, and find latitude. The mariner’s astrolabe measures the height of the sun or a star above the horizon.
Detailed explanation-2: -How was a mariner’s astrolabe used? The instrument was used to help determine the ship’s latitude from the height of the Pole Star or of the sun.
Detailed explanation-3: -astrolabe, any of a type of early scientific instrument used for reckoning time and for observational purposes. One widely employed variety, the planispheric astrolabe, enabled astronomers to calculate the position of the Sun and prominent stars with respect to both the horizon and the meridian.
Detailed explanation-4: -An early astrolabe was invented in the Hellenistic civilization by Apollonius of Perga between 220 and 150 BC, often attributed to Hipparchus.