Meteorological and astronomical instruments throughout history Sextant Presented

Meteorological and astronomical instruments throughout history

Sextant Presented by: (Spain) It is an astronomical and meteorological instrument. This instrument allows us to measure the height of the stars and the angular distance. It was very important for sailing because it establishes the latitude of the place where the people are situated.

How to use it Presented by: (Spain) -The sextant is placed perpendicularly and the instrument is oriented toward the horizon line. -The star is searched through the telescopic sight, moving the mirror until it is found. -It is made to coincide with the reflection of the horizon. -In this way a split image will be seen, on the one side a star and on the other the horizon.

Astrolabe Presented Spain by: USES ★ The astrolabe measures the position and height of stars and celestial bodies hour of the day ★ Sailing: it gives your position in the middle of the sea The oldest astrolabe that is preserved nowadays was built by the Persian astronomer Nastulus in the year 927.

Parts: Presented by: Spain MATER TYMPAN RETE ALIDADE

Antikythera mechanism Presented by: Spain ● It’s an analogical computer designed by Archimedes. ● It was used in order to predict moon phases and eclipses. ● It was the most complex instrument invented in Europe until the renaissance. ● It remained in the bottom of the sea during thousands of years.

Quadrant Presented by: (Spain) The quadrant is an ancient instrument used to measure angles in astronomy and navigation. It is used: ● To measure the height of the stars above the horizon ● To determine the latitude ● To determine the height of the Sun at noon and so the time of day

How to use it Presented by: (Spain) The quadrant consists of a quarter of a circle graduated from 0 to 90 degrees which at its right angle hangs a line with a plumb bob which indicates the vertical direction. The reading is obtained from the position of the string on the graduated arc, after observing the object of interest through a peephole. It can oly measure vertical angles.

EGYPTIAN SHADOW CLOCK Presented by: Spain Egyptians used the shadow the giant stone obelisks cast on the ground to tell the time of day. ● Each obelisk was built to tell a story. But they worked very well as shadow clocks. ● Later on, the ancient Egyptians invented the first portable timepiece. ● It was also a shadow clock, but you could carry it with you. It had a raised section in the middle. The rod was marked with 10 or 12 sections. ●

How to use it ● ● ● To tell time, the end of the rod must be pointed at the east in the morning and towards the west in the afternoon. The raised centerpiece casts a shadow on the rod. The shadow fell on the markings will tell what time it is. .