...about the sun, is, so to speak, a flattened circle, somewhat elongated, called an ellipse. The axis of the earth is not perpendicular to the plane of the orbit, which is an imaginary flat surface enclosed by the line of the earth's revolution, but is inclined...

...is slowest. Another cause which still increases this irregularity is due to the fact that the axis of the earth is not perpendicular to the plane of the orbit that it traverses around the sun (plane of the ecliptic). The length of the solar day can vary in 24...

...resulting from slow and inexorable gyrations in the earth's axis of rotation over thousands of years. The axis of rotation of the earth is not perpendicular to the plane of its path around the sun (known as "the plane of the ecliptic"). Because of this tilt (28 degrees from...

...during the winter. CD The Earth's orbit is not in the same plane as the orbits of the other planets. CD The axis of rotation of the Earth is not perpendicular to the plane of its orbit but instead is tilted at an angle. Table 1.7 Sample Question 7 Results (Multiple-Choice)...