How do you make an astrolabe?

Step 1: Cut out the astrolabe template on the black lines. Step 2: Cut a length of string, about 25 cm (10 inches) long. Tie a paperclip to one end of the string. Step 3: Poke a hole in the corner of the astrolabe, using scissors or a hole punch.

How do you make an astrolabe with a protractor?

How to Make the Astrolabe:

1. Tie one end of the string to the hole in the middle flat-edged side of the protractor. If there is not a hole carefully drill one.
2. Attach the metal weight to the other end of the string.
3. Tape the straw to the flat edge of the protractor.

Which part of the astrolabe is rotated to show the path of a bright star through the sky?

alidade
On the back of the astrolabe is a rotating bar called the alidade or label, which is used to measure the altitude above the horizon of celestial bodies.

Who made the astrolabe?

But there is strong evidence that the astrolabe got its start around the time of Claudius Ptolemy, a famous Greek astronomer who lived in the Roman Empire during the 2nd century AD. Ptolemy left records suggesting he used a three-dimensional instrument similar to the astrolabe to make calculations, says Jones.

How do you use a simple astrolabe?

Keep the device pointing at the sun and then read the altitude where it’s written in degrees on the side of the device. The point to read is where the rule crosses across the astrolabe. The rule is the moving part on the inside surface of the astrolabe.

What are the parts of an astrolabe?

The mater (Latin for mother) is the main body of the astrolabe. The edge of the mater is called the limb, on which are the degree scale and scale of hours are engraved. The hollowed-out part of the mater is called the womb and contains the latitude plates.

How accurate is an astrolabe?

In practice most mariner’s astrolabes are about 150 mm in diameter which makes each degree at the circumference about a millimetre. This appears very small, but in practice it is possible to divide this roughly into quarters which would create an error within 15 minutes of latitude, or fifteen nautical miles.

What does a astrolabe look like?

A later variation of the astrolabe is the spherical astrolabe, which looks like a sphere surrounded by a number of rings. The spherical astrolabe was also used in astronomy. The astrolabe is a predecessor of the sundial, which is still common today as an ornament in many gardens.

What replaced the astrolabe?

The mariner’s astrolabe was used until the middle or, at the latest, the end of the 17th century. It was replaced by more accurate and easier-to-use instruments such as the Davis quadrant.

What astrolabe is used for?

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.

What is the difference between an astrolabe and a sextant?

A sextant can measure an angle on any plane, and works by a principle of double reflection. An astrolabe can only measure angles in a vertical plane and was principally used for latitude-finding, although you can also use it for purposes such as finding the height of something.

How to build an astrolabe-uliege [ step by step guide ]?

Make a hole through the centre of all the pieces, in the place indicated by the small circle. 4. Assemble the astrolabe with the label on the back of the mother, and the rete and then the rule on the front of the mother. Hold the astrolabe together with a split-pin paper fastener. 5.

How to create a report with astrolabe software?

Create highly salable color or b&w printouts with your own choice of wheel styles, fonts, graphics and page formats …. and do all kinds of reports automatically, in a single batch. Our unique Astrolabe Report System interface allows you to choose from your stable of reports with just a few clicks of the mouse.

Who was the author of the astrolabe manual?

Written by Geoffrey Chaucer (of Canterbury Tales fame) in the 14th century, it was an interesting book, but did little to answer my questions. What I wanted and needed was a good, simple description of the astrolabe’s parts and functions; with examples of how it could be used; in short, a computer manual.

How do you make an astrolabe out of a mother?

Assemble the astrolabe with the label on the back of the mother, and the rete and then the rule on the front of the mother. Hold the astrolabe together with a split-pin paper fastener. 5. You should be able to rotate each of the label, rule and rete independently from each other. 6. Make a small hole in the top of the mother.

https://www.youtube.com/watch?v=AZsoMgfVSfY