Transit Instruments, Pais Observatory
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Transit Instruments, Pais Observatory
Transit instruments were pivoted telescopes that allowed astronomers to time the passage of a star over the meridian (an imaginary line through the poles). As the heavens rotated, an astronomer would look through the transit telescope (aligned in the meridian) and note when a particular star crossed his field of vision. At the precise moment that the star passed, the astronomer noted the time via the ticking of a nearby astronomical regulator, an accurate clock used specifically for timing these transit observations. Without such measurements, the transit instrument wasn t able to do its job. A Mural Circle is an instrument used before the invention of the telescope to measure the angle above the horizon of astronomical objects as they crossed the meridian. Coloured engraving from The Heavens by Amedee Guillemin, Publ. Richard Bentley, 1878
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6316343
© DAVID PARKER/SCIENCE PHOTO LIBRARY
Angle Circle Clock France Galaxy Heavens Horizon Measure Measurement Meridian Poles Star Telescope Time Transit Transit Instrument
EDITORS COMMENTS
This print transports us back to the 19th century, offering a glimpse into the world of astronomy and scientific exploration. The image showcases two remarkable instruments that played crucial roles in understanding the mysteries of our universe: transit instruments and mural circles. The transit instrument, elegantly aligned with the meridian, allowed astronomers to precisely time the passage of stars across their field of vision. This pivotal telescope relied on an accurate astronomical regulator clock nearby, ensuring precise measurements were recorded. Without these meticulous observations, this instrument would be rendered ineffective in its mission. Adjacent to it stands a mural circle, an ingenious device predating telescopes. It measured the angle above the horizon at which celestial objects crossed the meridian. This essential tool enabled astronomers to gather valuable data about galaxies and other astronomical phenomena. The enchanting engraving captures both instruments against a backdrop reminiscent of France's Pais Observatory - a hub for scientific discovery during that era. Its intricate details highlight not only technological advancements but also humanity's relentless pursuit to comprehend our place within the vastness of space. As we admire this historical snapshot from Science Photo Library's collection by OPEN, we are reminded of how far we have come in unraveling cosmic secrets while acknowledging those who paved the way for modern-day astronomy through their dedication and ingenuity.
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