Measuring star positions, illustration. The device being used here, variously known as a cross-staff or a Jacob's staff, is used in astronomy to measure the position of a star in the sky. This is determined by the angle it makes with the horizon (green arrow).
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Creative#:
TOP26514152
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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angleangularcoordinateastronomicalastrophysicalblackbackgroundcelestialcoordinatesystemmeasurementno-onenobodypositionstartechnologicalwhitejacob'sstaffcross-staffequipmentinstrumentdevicenightskymeasuringastronomyastrophysicstechnologyastronomerscientistadultmalemancaucasianartworkillustrationdiagram
adultangleangularartworkastronomerastronomicalastronomyastrophysicalastrophysicsbackgroundblackcaucasiancelestialcoordinatecoordinatecross-staffdevicediagramequipmentillustrationinstrumentjacob'smalemanmeasurementmeasuringnightno-onenobodypositionscientistskystaffstarsystemtechnologicaltechnologywhite