The astrolabe
A very ancient astronomical computer for solving problems relating to time and
the position of the Sun and stars in the sky. This was extremely inaccurate because it used the North Star. This device was also used to determine latitude.
A very ancient astronomical computer for solving problems relating to time and
the position of the Sun and stars in the sky. This was extremely inaccurate because it used the North Star. This device was also used to determine latitude.
Caravel
A small, highly maneuverable sailing ship
developed in the 15th century by the Portuguese
to explore along the West African coast and into the Atlantic Ocean.
A small, highly maneuverable sailing ship
developed in the 15th century by the Portuguese
to explore along the West African coast and into the Atlantic Ocean.
Magnetic compass
An instrument that uses a magnetized steel bar to indicate
direction relative to the earth's magnetic poles.
This invention is used today and is accurate in the way that
it uses the earth's magnetic poles to show which direction is north.
An instrument that uses a magnetized steel bar to indicate
direction relative to the earth's magnetic poles.
This invention is used today and is accurate in the way that
it uses the earth's magnetic poles to show which direction is north.