Zenith - Wikipedia
The zenith (UK: / ˈ z ɛ n ɪ θ /, US: / ˈ z iː n ɪ θ /) [1] is the imaginary point on the celestial sphere directly "above" a particular location. "Above" means in the vertical direction opposite to the gravity direction at that location . The zenith is the "highest" point on the celestial sphere.
Zenith | Celestial Point, Celestial Sphere & Celestial Coordinates ...
zenith, point on the celestial sphere directly above an observer on the Earth. The point 180° opposite the zenith, directly underfoot, is the nadir. Astronomical zenith is defined by gravity; i.e., by sighting up a plumb line.
Chapter 2: Reference Systems - NASA Science
The point on the celestial sphere directly overhead for an observer is the zenith. An imaginary arc passing through the celestial poles and through the zenith is called the observer's meridian.
Lie Back, Look Up, and Find Your Zenith Stars - Sky & Telescope
2023年5月10日 · When relaxing under the stars there's no better way than on your back looking up at the zenith. We explore what's overhead at the zenith.
What is zenith in astronomy? - California Learning Resource …
2025年1月6日 · The zenith is an important concept in astronomy because it is used to locate celestial objects in the sky. By measuring the angle between the observer’s vertical and the object’s apparent position in the sky, astronomers can determine the …
Zenith - In-The-Sky.org
The zenith is the point in the sky vertically straight above the observer. It is the point where the observer's sight-line is perpendicular to the Earth's atmosphere, and hence where the smallest amount of air – termed the airmass – lies along it.
Azimuth vs. Zenith - What's the Difference? | This vs. That
Azimuth and zenith are two terms commonly used in astronomy and navigation to describe the position of celestial objects in the sky. Azimuth refers to the direction of an object in the horizontal plane, measured in degrees clockwise from true north.
Zenith - Astrodienst Astrowiki
The point at which a perpendicular from any given location on the Earth's surface intersects the Celestial Sphere. The zenith is located directly above the observer. The astronomical Meridian also is determined by the zenith, and is defined as a circle on the celestial sphere that passes through the zenith, the nadir, and the celestial poles.
Zenith - Simple English Wikipedia, the free encyclopedia
In astronomy, the zenith is a point "above" a particular location, in the sky. "Above" means in the opposite direction of gravity at that location. The zenith is the opposite of the nadir. The nadir is in the direction the direction that gravity pulls.
What is Zenith? Definition of Zenith, Zenith Meaning - The Economic Times
Zenith, in astronomy terms, is the point in the sky directly overhead. For example, when a person says that the Sun has reached its zenith, it is used to refer to the sun’s position in the sky. According to astronomers, there is no zenith for a Sun’s position but to any observer, the Sun has reached its zenith if it is directly overhead.