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There is no such line. The imaginary line through its centre is the axis, which the Earth rotates around; the imaginary line an equal distance from the poles is the equator. Neither make it spin - that is caused by momentum from the planet's formation.
Ecliptic
The Earth revolves around its axis, an imaginary line running through the centre of the Earth from the North pole to the South pole. As an orbiting planet, its orbit takes it around the Sun once every year.
The imaginary line around which the earth turns is its axis.
This is hard to go through without a drawing, but let's try it: Draw the earth as a circle, with a center. Indicate the ISS with a dot. Draw a line from the earth's center to the ISS. Draw a line from the ISS tangent to the earth's surface. Draw the radius from the earth's center to the ISS horizon (the tangent point). A corollary in geometry tells us that a radius is perpendicular to a tangent. This is very helpful ... we know we have a right triangle. Hypotenuse is the line from the center to the ISS; its length is (earth radius)+(ISS altitude) = 3,970+240 = 4,210 miles. One leg = earth radius = 3,970 miles Other leg = distance from ISS to the horizon = sqrt[ hypotenuse2 - leg2 ] = sqrt(42102-39702) = 1,401 miles (rounded)
The average distance from the earth to the moon is approx 250000 miles. If you could travel to the moon at 25000 in a staright line, it would take 10 hours.
The Circumference of the Earth is 24,900 miles. If it were possible to walk in a straight line all around the Earth. Which it is not.
An X with a line over it represents 10,000. A V with a line over it represents 5,000. Therefore, 25000 is: ___ XXV
the equator is the imaginary line around the earth.
The equatorial circumference of the earth is 24901.45 miles (40075.02 km).More Detail:The Earth is not a perfect sphere. Its shape is more of an oblate spheroid. As a consequence, a line of longitude wrapped around the Earth going through the north and south poles is about 24,859.73 miles, or 40,007.86 km long. That makes the Earth's circumference about 42 miles longer (about 67 km longer) measured around its middle than around its poles.
The horizontal line that goes around the "waist" of the Earth is the Equator. The vertical line that goes vertically around the Earth, through the poles, is the Prime Meridian.
The horizontal line that goes around the "waist" of the Earth is the Equator. The vertical line that goes vertically around the Earth, through the poles, is the Prime Meridian.
The imaginary line between the poles of the Earth around which the Earth spins is called the "axis of rotation".
The equator is an imaginary line which indicates where the middle of the earth is and it goes around.
If you followed a straight line around the equator you would travel 40,075 Km (24,902 miles) to return to your starting point.
axis
*390,682,810 miles. If the Earth and Jupiter are not in a line with the sun with the sun in the middle, however, this answer will be incorrect.