Because of the oblique angle of the Ecliptic to the equator, certain signs at mid latitudes take longer to rise above the horizon that others. In the Southern Hemisphere, the signs Cancer to Sagittarius are called signs of SHORT Ascension and the signs Capricorn to Gemini are called signs of LONG Ascension. The reverse signs apply in the Northern Hemisphere. Above a certain latitude, some signs do not rise at all. Signs that require longer are called the signs of long ascension, those that rise more quickly the signs of short ascension. In the northern hemisphere, Cancer through Sagittarius are signs of long ascension, Capricorn through Gemini the signs of short ascension. This condition is reversed in the Southern Hemisphere. Why does the angle between the horizon and the ecliptic change? Why does a steeper angle between the horizon and the ecliptic causes the ascending sign to take longer to rise? Imagine a ball with a circle drawn around its middle. As long as the ball is rotated around the pole of this circle, the circle turns evenly. But if it is rotated around a different pole, it will wobble back and forth, thus continually changing the angle it makes with any other fixed circle When the plane of the ecliptic makes its steepest angle with the plane of the horizon, the sign on the horizon will take the longest to rise. A segment perpendicular to the plane of rotation must pass through its entire length to rise, whereas if it is at some angle to this, the amount of time to rise depends on the component in the plane of rotation, which is shorter the more the plane deviates.