The astrological wheel begins at the center-left, known as the eastern horizon line. It starts with Aries and moves counter-clockwise through the Zodiac, ending in Pisces. The Houses are numbered one to twelve beginning with the horizon line, also known as the Ascendant or Rising sign.
The Wheel
By Molly Hall, About.com Guide
Here's a pictorial Zodiac that shows the houses, and the signs around the wheel.
(c) Courtesy of Carmen Turner-Schott
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