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astrolabe - Coggle Diagram
astrolabe
Mother back
shadow scale
determine the distance of objects relative to you
determine the height of objects
notable saints (marks the feast days of notable christian saints)
months/dates
collectively designate a year
helps in determining the exact time of year according to the suns rotation around the ecliptic
zodiac signs (designates when the sun is passing through the constelations
outer scale
indicate a stars altitude in degrees
indicates the change in the sun's degrees across its movement through the zodiac
alidade
sights
help align objects for measuring height
help align objects for measuring distance
measuring scale (help measure the elevation of stars)
mother front
climate
horizon
show which stars are visible under current conditions
help determine the time when aligned with the night sky
azimuth (designate the angle of stars)
zenith
help determine the altitude of stars
indicate the point overhead
lines of latitude
equator
designate the earth's angle with respect to the rest of the astrolabe
show how the rest of the astrolabe is moving across the hemisphere
tropic of cancer
indicates entry of the summer solestace
signals suns movement across the ecliptic towards the northern hemisphere
tropic of capricorn
indicates entry of the winter solestace
signal suns movement across the epliliptic towards the southern hemisphere
rete
ecliptic
mark the sun's path across the celestial hemisphere
display the rise and fall of the sun
celestial hemisphere
display the visible stars
mimic the rotation of stars in the night sky
help align the night sky's current appearance
list of even hours (determine the skys appearance at certain times)
rule
help measure the location of the sun in even hours
helps measure the declination of stars
12 unequal hours (estimating the time in unequal hours)
24 equal hours (measuring the time in equal hours)