What is the point directly beneath an observer?

Zenith: The point directly above the observer on the celestial sphere is called the Zenith. The point opposite the zenith, or directly below the observer on the celestial sphere is called the nadir (not shown here).

What is the point directly above the observer called quizlet?

Zenith is directly overhead. Nadir is directly below (which the earth blocks view of). Azimuth is measured from the north point. Altitude is measured from the horizon.

What is the point called that is directly overhead 90 degrees of an observer?

The point straight overhead on the celestial sphere for any observer is called the zenith and is always 90 degrees from the horizon. The arc that goes through the north point on the horizon, zenith, and south point on the horizon is called the meridian.

What is the point in the sky directly above your position called?

The zenith is an imaginary point directly “above” a particular location, on the imaginary celestial sphere. “Above” means in the vertical direction (plumb line) opposite to the gravity direction at that location (nadir). The zenith is the “highest” point on the celestial sphere.

What is directly above the North Pole?

The north and south celestial poles are the two imaginary points in the sky where Earth’s axis of rotation, indefinitely extended, intersects the celestial sphere. The north and south celestial poles appear permanently directly overhead to observers at Earth’s North Pole and South Pole, respectively.

What do we call the point on the celestial sphere directly above the South Pole?

South celestial pole. Point of the celestial sphere directly above earths South Pole. Celestial equator. Imaginary line around the sky directly above earth’s equator.