An Astrolabe. See the website www.astrolabe.org,
or Wikipedia, or use Google books for a public domain encyclopedia. I own an old encyclopedia britannica, the 1903 edition and love it for answering questions such as this, or those related to woodworking, carpentry, masonry, or industrial machinery; e.g. what does an automatic pattern knitting machine or a jacquard loom look like?.
historically several instruments were used to measure this angle, they include the quadrant, cross staff, the backstaff and the mariner's astrolabe.
The instrument commonly used to measure the gases in stars is called a spectrometer. This device analyzes the light emitted or absorbed by a star, breaking it down into its constituent wavelengths. By examining the resulting spectrum, astronomers can identify the chemical elements present and their abundance, as well as gauge the star's temperature, density, and motion.
In ancient times, instruments like astrolabes and star charts were used to determine position using the stars in Mecca. Astrolabes measured the altitude of stars above the horizon, while star charts helped identify specific stars and their positions relative to Earth. These tools were essential for navigation and timekeeping.
An instrument used to measure stars is called a spectrometer. It analyzes the light emitted or absorbed by stars, allowing astronomers to determine their composition, temperature, distance, and velocity. Another important tool is the telescope, which magnifies distant celestial objects, enabling precise observations and measurements of stars’ positions and brightness. Together, these instruments enhance our understanding of the universe.
The barometer is the instrument that is used to measure the air pressure.
This instrument is an adequate type of balance.
Astral navigation. By using a sextant (instrument used to measure the altitude of a celestial object) a clock and logarithms you can work out your position on the earth's surface hence 'sailing by the stars'
An Astrolabe.
Navigational instrument or tool such as a sextant or astrolabe is used to measure the angle between a celestial body (sun or stars) and the horizon. This information helps determine the ship's position on a map by calculating latitude and longitude coordinates.
an astronomical instrument for taking the altitude of the sun or stars and for the solution of other problems in astronomy and navigation: used by Greek astronomers from about 200 b.c. and by Arab astronomers from the Middle Ages until superseded by the sextant.
Explorers such as Christopher Columbus and Ferdinand Magellan used a quadrant, a navigational instrument, to measure the altitude of celestial bodies like the sun or stars to determine their position at sea. This helped them navigate and map their way during their explorations.
A cross staff is a navigational instrument used to measure angles, typically for celestial navigation, by aligning a crosspiece with an object in the sky. An astrolabe is a historical instrument used to observe and measure the positions of stars and planets. It was used for navigation, timekeeping, and astrology.
No. The instrument used to measure wind speed is an anemometer.
The instrument which is used to measure snowfall is called a snow gauge.
A thermometer
There is no single instrument for either of these things
The instrument used to measure humidity is called a hygrometer.
The instrument used to measure humidity is called a hygrometer.