That's the observer's 'zenith'. Since it's referenced to the
"observer's head", each observer has a different zenith.
The zenith.
The microscope has two systems of lenses: the ocular lens into which the observer looks; and objective lenses placed directly above the object being observed.
The local zenith is perpendicular to the rotation axis of the Earth at a specific location. It represents the point directly above an observer, pointing towards the celestial sphere. The rotation axis of the Earth is an imaginary line around which the Earth spins.
The epicenter of an earthquake is directly above the focus or hypocenter, which is the point where the seismic waves originate within the Earth. It is typically located on the Earth's surface directly vertically above the focus.
The earth's axis of rotation is tilted relative to its orbit around the sun, causing Polaris to align with the earth's axis. When an observer measures the altitude of Polaris above the horizon, they can determine their latitude because Polaris' altitude corresponds to the observer's angular distance from the North Pole.
The zenith.
The zenith.
Zenith
The celestial equator is an imaginary circle created by extending Earth's equator into space. Zenith is an imaginary point in the sky directly above and observer on earth.
That's called the observer's "zenith".
The epicenter is the point on the earth's surface directly above the earthquake's origin.
The hypocentre is the point inside the Earth where an earthquake starts. The point on the Earth's surface directly above this is the epicentre.
The microscope has two systems of lenses: the ocular lens into which the observer looks; and objective lenses placed directly above the object being observed.
The high point in the sky is likely the zenith, which is the point directly above an observer. It is the highest point in the sky that can be seen from a specific location. The zenith changes as you change your position on Earth.
The local zenith is perpendicular to the rotation axis of the Earth at a specific location. It represents the point directly above an observer, pointing towards the celestial sphere. The rotation axis of the Earth is an imaginary line around which the Earth spins.
The point just overhead is called the zenith. The objects visible at that point depend on the date, the time of day or night, and the observer's location.
No, the location on the Earth's surface directly above the epicenter of an earthquake is called the hypocenter or focus. The focus is the actual point within the Earth where the earthquake originates, whereas the epicenter is the point on the Earth's surface directly above the focus.