Blink comparator – Astronomical instrument used to measure movements or variations in the brightness of celestial objectsPages displaying wikidata descriptions as a fallback
Bolometer – Device for measuring incident electromagnetic radiation
Nebra sky disk – Bronze artefact, c. 1600 BC, found in Nebra, GermanyPages displaying short descriptions of redirect targets
Nocturnal – instrument used to determine the local time based on the relative positions of two or more stars in the night skyPages displaying wikidata descriptions as a fallback
Octant – Measuring instrument used primarily in navigation; type of reflecting instrument
Optical spectrometer, also known as Spectrograph – Instrument to measure the properties of visible light
Blink comparator – Astronomical instrument used to measure movements or variations in the brightness of celestial objectsPages displaying wikidata descriptions as a fallback
Bolometer – Device for measuring incident electromagnetic radiation
Nebra sky disk – Bronze artefact, c. 1600 BC, found in Nebra, GermanyPages displaying short descriptions of redirect targets
Nocturnal – instrument used to determine the local time based on the relative positions of two or more stars in the night skyPages displaying wikidata descriptions as a fallback
Octant – Measuring instrument used primarily in navigation; type of reflecting instrument
Optical spectrometer, also known as Spectrograph – Instrument to measure the properties of visible light