At the time of the equinoxes, the sun's rays would be nominally tangent to the Earth at the
north and south poles. Those are 90 degrees north and south of the equator respectively.
Also I think at either 23.5 degrees north or 23.5 degrees south at sunrise and sunset.
Who told you that ? There is no "why", because you certainly can. From the northern hemisphere, you can see stars with declinations down to (your latitude) minus (90°).
In the northern hemisphere, the altitude of the North Star, or Polaris, is approximately equal to the observer's latitude. This means that if you are at a latitude of 40 degrees north, Polaris will be about 40 degrees above the northern horizon. This relationship makes Polaris a useful navigational tool for determining one's latitude.
latitude of the observer
The direction of the sun will be highest in the sky at solar noon, when it reaches its zenith position. This occurs when the sun is directly overhead, which happens at the equator during the equinoxes and varies with latitude throughout the year. In the Northern Hemisphere, the sun is highest in the sky during the summer solstice, while in the Southern Hemisphere, it is highest during their summer solstice.
The tangent ray refers to either the northernmost or southernmost hemisphere where the vertical rays refers to direct sun. During the June 21 solstice, the latitude rays in the northern hemisphere would be 66.5 degrees N (Arctic Circle)
The hemisphere according to latitude in which India lies is Northern Hemisphere.
The latitude of the northern hemisphere extends from 0 degrees at the Equator to 90 degrees North at the North Pole.
Greece is in the northern hemisphere. The northern hemisphere is north of the equator. The southern hemisphere is south of the equator. You can find this out on a map and/or with latitude or longitude.
there are 90 degrees of latitudes in northern hemisphere
Yes, Rome is in the northern hemisphere. It is located at a latitude of about 41.9° N.
the equator.
The Equator, at 0 degrees latitude, divides the Earth into the Northern Hemisphere and the Southern Hemisphere.
It should be remembered that the seasons are diametrically opposed in the hemispheres. When it is summer in the northern hemisphere it is winter in the southern one. Seasons officially start and end on the solstices and equinoxes. The solstices are the days on which daylight or night time are the longest. When the day is longest in the northern hemisphere night is longest in the southern. The equinoxes are when day time and night time are equal which varies depending on your latitude. (Except at the equator)
The US is in the Northern Hemisphere by latitude and the Western Hemisphere by longitude.
The US is in the Northern Hemisphere by latitude and the Western Hemisphere by longitude.
Most of China is in the Northern Hemisphere
The Equator runs through Ecuador, dividing the earth into the Northern Hemisphere and the Southern Hemisphere. It is significant for being the line where the sun is directly overhead at the equinoxes, resulting in equal day and night lengths.