astronomical clock
Planetary position display
An astronomical clock is a clock that displays astronomical information beyond the time of day—typically the positions of the sun, moon, planets, or constellations, along with the zodiac, lunar phases, or eclipse predictions.
Historic examples in European town squares, like Prague's Orloj, are elaborate mechanical marvels with moving figures and multiple dials.
Modern versions may be digital or simplified.
Toothed rotating machine parts
- escapementTick-controlling clock component
- wheelworkInterconnected rotating components
- cogsProjections on a wheel
- dialGraduated circular indicator
astrolabe · orrery · clockwork · complication · train · pinion · arbor · mainspring
Celestial belt of signs
- eclipticSun's apparent annual path
- equinoxSun crosses celestial midline
- solsticeDay of maximum tilt
- sunEarth's primary star
moon · planets · constellations · celestial sphere · sidereal · lunar phase · star map · Ptolemaic
Czech Republic's chief city
- StrasbourgAlsatian regional capital
- medievalOf the Middle Ages
- RenaissanceEuropean cultural reawakening
- cathedralBishop's principal church
town hall · Bern · apostles · automata · procession · bell tower · facade · heritage
Date-tracking system
month · day · week · season · mean time · local time · chronometry · perpetual calendar
gears
Toothed rotating machine parts
- escapementTick-controlling clock component
- wheelworkInterconnected rotating components
- cogsProjections on a wheel
dial · astrolabe · orrery · clockwork · complication · train · pinion · arbor · mainspring · indicator
zodiac
Celestial belt of signs
sun · moon · planets · constellations · celestial sphere · sidereal · lunar phase · star map · Ptolemaic · geocentric
Prague
Czech Republic's chief city
- StrasbourgAlsatian regional capital
- medievalOf the Middle Ages
- RenaissanceEuropean cultural reawakening
cathedral · town hall · Bern · apostles · automata · procession · bell tower · facade · heritage · landmark
calendar
Date-tracking system
year · month · day · week · season · mean time · local time · chronometry · perpetual calendar · annual
- timekeepingwatch, watches, clocks, timer, calendar
- clockswristwatch, pocket watch, digital watch, smartwatch, marine chronometer
- timekeeping traditionssundial, hourglass, calendar, lunar calendar, solar calendar
- timepieceswristwatch, pocket watch, stopwatch, watch, sundial
- clock towersbell tower, Big Ben, campanile, belfry, carillon
- CzechoslovakiaPrague, Bratislava, Bohemia, Slovakia, Moravia
astronomical clocksundial
Shadow-based timekeeper
hourglass · digital watch · kitchen timer · water clock · egg timer
astronomical clockpocket watch
Portable chain-attached timepiece
wristwatch · bedside clock · travel clock · desk clock · mantel clock
clock, astronomy, astronomical, astronomer, timepiece, astronomers, astronomic