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What is the point on the celestial sphere directly above observer?
The zenith.
A is the point on the celestial sphere directly above the head of the observe?
That's called the observer's "zenith".
What is an imaginary point in the sky directly above the observers head?
The zenith.
What is visable on the celestial sphere directly above the observer?
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.
What is greenwich celestial?
Greenwich Celestial refers to the Prime Meridian as it crosses the celestial sphere above Greenwich, UK. It serves as the global reference point to measure longitude and is used in celestial navigation and astronomy.
What is the star latitude and star declination?
Celestial coordinates. -- The star's latitude on the celestial sphere is the same as the Earth latitude that it seems to follow on its way aroujnd the sky. On the celestial sphere, the latitude is called "declination", and is expressed in degrees. -- The star's longitude on the celestial sphere is its angle, measured westward, from the point in the sky called the Vernal Equinox ... the point where the sun appears to cross the celestial equator in March. On the celestial sphere, the star's longitude is called "Right Ascension", and it's expressed in hours. That certainly seems confusing, but an "hour of Right Ascension" just means 15 degrees of celestial longitude. So, as the sky turns, the point directly over your head moves through the stars by 1 hour of Right Ascension every hour.
Where on earth would you go to place a celestial pole on your zenith?
The celestial pole is directly above Earth's geographic poles, so to place a celestial pole at your zenith you would need to be at either the North Pole or the South Pole. At these locations, the celestial pole would be directly overhead, making it appear as if the axis of Earth's rotation extended into the sky.
Does The celestial equator always pass directly overhead?
No, the celestial equator does not always pass directly overhead. The position of the celestial equator in the sky is determined by the observer's latitude on Earth. If the observer is located at the equator, the celestial equator will pass directly overhead. However, for observers at different latitudes, the celestial equator will appear at an angle to the horizon.
Is localzenith is perpendicular to rotation of axis or center of eirth?
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.
What celestial line is a product of the Earth's rotation?
The celestial line that is a product of Earth's rotation is the celestial equator. It is an imaginary line located above Earth's equator and is created as a result of Earth's rotation on its axis. It divides the celestial sphere into northern and southern hemispheres.
What is the celestial pole?
The celestial pole is the point in the sky directly above the Earth's North or South Pole. The North Celestial Pole is located near the North Star (Polaris), while the South Celestial Pole does not have a bright star near it. Stars appear to rotate around these points due to Earth's rotation.
What do we call the imaginary extension of earth's equator into space?
The imaginary extension of Earth's equator into space is called the celestial equator. It is an imaginary line in the sky above the Earth's equator, dividing the celestial sphere into northern and southern hemispheres.
