Astronomy & Space Science · AST-036
Altitude, Azimuth & the Local Horizon: Foundations
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Overview
The physical idea behind Altitude, Azimuth & the Local Horizon
Altitude and azimuth form a local coordinate system that describes where an object appears in an observer's sky at a particular place and time. Altitude measures angle above the horizon, while azimuth measures direction around the horizon.
Evidence behind this section3 claims
Altitude and azimuth form a local coordinate system that describes where an object appears in an observer's sky at a particular place and time.
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References & evidence
Source library for this chapter
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- 01Earth and SkyOpen source ↗
OpenStax Astronomy 2e · Mar 9, 2022
View claim-by-claim traceability3 verified claims
Altitude and azimuth form a local coordinate system that describes where an object appears in an observer's sky at a particular place and time.
supported · checked Sep 22, 2026As Earth rotates, a fixed star's right ascension and declination remain nearly constant over a night, but its altitude and azimuth change continuously.
supported · checked Sep 22, 2026Telescope pointing software converts catalog coordinates and time into local altitude and azimuth.
supported · checked Sep 22, 2026