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Glossary term: Zenith

Description: Zenith is defined as the point directly above the observer. It is relative to the position of the observer as the zenith for a person in London would be different from that of a person in Beijing or Cape Town. Measured in angles it is 90 degrees from the horizon. The zenith angle represents the angular distance between a celestial object and the zenith. An object at zenith has a zenith angle of 0 degrees and one on the horizon has an angle of 90 degrees. As a fun fact, the point directly under the observer is called a nadir.

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Term and definition status: This term and its definition is still awaiting approval

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".