no
Only if you are at the North Pole.
No. It will only always be CLOSE to the zenith if you happen to be at the north pole. At other latitudes, for example if you live at 30° north latitude, it will be about 30° above the horizon (to the north), if you live at 50° north latitude, it will be about 50° above the horizon, etc.
No, zenith and the North Star are not the same. The zenith is the point directly above an observer, whereas the North Star (Polaris) is a star located near the celestial North Pole in the Northern Hemisphere, making it useful for navigation.
Your latitude is 20 degrees north of the equator because Polaris is located at the celestial north pole, which is directly above the Earth's North Pole. This means that the angle between Polaris and your zenith corresponds to your angular distance north of the equator.
If you were standing at Earth's North Pole, the North Star, also known as Polaris, would be located directly in the zenith, or straight overhead. This is because Polaris is situated very close to the celestial north pole in the night sky.
You would be pretty darn close to the north pole. _______________________ Specifically, you would be within about 40 miles of the north pole. Polaris is about 2/3 of a degree away from being directly above the north pole.
If Polaris, also known as the North Star, was directly over your head, you would be located at the North Pole. At this point, Polaris would be positioned at the zenith, directly above you at an angle of 90 degrees. This unique position indicates that you are at the northernmost point on Earth, where all lines of longitude converge.
The altitude of polaris for an observer is always the same as your latitude so it would be 64oN
Polaris is located in the Ursa Minor constellation.
That's the observer's 'zenith'. Since it's referenced to the "observer's head", each observer has a different zenith.
As you travel northward, the latitude of Polaris, also known as the North Star, corresponds to your geographical latitude. This means that if you are at the North Pole (90° N), Polaris will be directly overhead at the zenith. As you move southward, Polaris appears lower in the sky, aligning with the latitude you are at. Essentially, the angle of Polaris above the horizon matches your northern latitude.
As seen from 25 degrees north latitude and ANY longitude, Polaris (the 'North Star', the 'Pole Star') appearswithin about 1/2 degree of due north and 25 degrees above the northern horizon, at any time.