It is measured exactly the same in the Southern Hemisphere (no difference between the two hemispheres).
It is the difference between magnetic north and true north and it varies all over the globe.
Magnetic declination (also called magnetic variation) is positive when magnetic north is east of true north (clockwise) and it is negative when magnetic north is west of true north (anti-clockwise).
The four hemispheres are called the Northern Hemisphere, Southern Hemisphere, Eastern Hemisphere, and Westhern Hemisphere.
The Equator divides the southern and northern hemisphere.
The world is divided into 4 quarters - western hemisphere, eastern hemisphere, northern hemisphere, and southern hemisphere.
A hemisphere is exactly 1/2 of the earth. We speak of the Western Hemisphere, the Eastern Hemisphere. the Southern Hemisphere, and the Northern Hemisphere.
the hemisphere divides the earth into four different chunks
Inclination is measured as the angle at which the satellite crosses the equator while passing from the southern hemisphere to the northern hemisphere. Declination is the difference between magnetic North as reported by a compass and true North.
The Summer Solstice in the northern hemisphere, where the sun is highest declination.
The magnetic declination is greatest in the northern part of North America, particularly in areas close to the magnetic North Pole. This includes regions of northern Canada and Alaska, where the declination can exceed 20 degrees. As one moves southward, the declination generally decreases.
Magnetic declination is measured clockwise because it indicates the direction in which the magnetic north pole is offset from true (geographic) north. By using a clockwise system, it simplifies navigation and helps orient compasses accurately towards true north. The positive or negative sign of the declination indicates whether you need to adjust your compass reading to the east or west to find true north.
Magnetic declination, or the angle between magnetic north and true north, is typically most pronounced in areas near the magnetic poles. This includes regions like northern Canada and parts of northern Russia, where the magnetic field lines are more vertical and can lead to significant variations in declination. Additionally, areas around the equator may also experience notable declination changes due to the complex interactions of the Earth's magnetic field.
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°).
The magnetic pole in the Northern Hemisphere is located in the Arctic region of Canada. It is where the Earth's magnetic field lines are perpendicular to the surface of the Earth, causing a compass needle to point straight down.
The Summer Solstice in the northern hemisphere, where the sun is highest declination.
From the perspective of the Northern Hemisphere, this solstice will be called the "winter" solstice.
No, the moon is only up for approximately half of the day depending on it's declination in it's orbit. When the moon is at it's most northerly declination, the moon will be above the horizon for a much longer period of time when viewed from the Northern Hemisphere, and will be in the Northern Hemisphere sky for a much shorter period of time when the moon is at it's most southern declination - at the same time however, the moon will be in the Southern Hemisphere's sky for much longer.
This only happens on the fall equinox, the dividing line between summer and fall. If you live in the northern hemisphere, this happens on September 21 (plus or minus one day because of the cycle of leap years) and in the southern hemisphere on March 21.
A star with a declination of -60 degrees will be located in the southern celestial hemisphere. This means it will be positioned 60 degrees south of the celestial equator. Observers in the southern hemisphere will be able to see it high in their sky, while those in the northern hemisphere will not be able to see it at all.