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The direct line across the Earth's or any astronomical body's diameter from pole to pole is its axis.

The circumferential lines imagined on the surface are the Lines of Longitude.

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What are meridian?

A Meridian or Meridian Line is an imaginary line drawn between two points. In geography these two points are an imaginary arc on the earths surface from the North to the South Poles. In astronomy it is an imaginary circle in a perpendicular plane to those planes of the celestial equator and horizon.


What is the imaginary line called that extends between the poles?

There are two -- the Prime Meridian -- 0 degrees, and the International Date Line -- 180 degrees.


What imaginary line cuts the earth into 2 equal parts?

The imaginary line that cuts the earth into two equal parts is called the equator. It is an imaginary circle around the Earth that is equidistant from the North and South poles. It divides the Earth into the Northern Hemisphere and the Southern Hemisphere.


What is the imaginary line on the Earth's surface running between the North Pole and the South Pole?

There are two lines that both terminate at the poles: the International Date Line and the Prime Meridian.


The axis is an imaginary line that passes through which two points on the earth?

The axis is an imaginary line that passes through the North and South Poles of the Earth. This axis is tilted at an angle of approximately 23.5 degrees from perpendicular to the plane of the Earth's orbit around the Sun, which causes the changing seasons.


What is the line between the two poles called?

The lines joining the two poles are longitudes.


What is similar between parallel lines and meridian lines?

Meridian lines are halves of imaginary circles joining two diametrically opposite points on a sphere. For the earth the points are the geographical North and South poles. Parallel lines (parallels of latitudes) are a set of imaginary lines that are parallel to the equator - which is the line of points that are equidistant from the poles. These two sets of lines act as a set of coordinates for the surface of the earth.


What is the imaginary line that divides the earth into two hemisphers?

Equator


What is an imaginary line in which earth spins?

there are two imaginay line called the prime meridian


The midline is an imaginary line running between the patients?

No, not exactly. The midline is an imaginary line running down a person. This divides the person into two halves.


Who discovered the celestial pole?

The north and south celestial poles are two imaginary points and therefore cannot be "discovered".


Is a equator a invisible line that splits earth in half?

The equator is an imaginary circular line around the entire earth, with the center of the circleat the center of the earth.Any circle that has its center at the center of the earth divides the earth's surface exactly in half.