Editing Celestial pole (section)

===Method two: Canopus and Achernar===

The second method uses [[Canopus]] (the second-brightest star in the sky) and [[Achernar]]. Make a large [[equilateral triangle]] using these stars for two of the corners. But where should the third corner go? It could be on either side of the line connecting Achernar and Canopus, and the wrong side will not lead to the pole. To find the correct side, imagine that Archernar and Canopus are both points on the circumference of a circle. The third corner of the equilateral triangle will also be on this circle. The corner should be placed clockwise from Achernar and anticlockwise from Canopus. The third imaginary corner will be the south celestial pole. If the opposite is done, the point will land in the middle of [[Eridanus (constellation)|Eridanus]], which isn't at the pole. If Canopus has not yet risen, the second-magnitude [[Alpha Pavonis]] can also be used to form the triangle with Achernar and the pole. In this case, go anticlockwise from Achernar instead of clockwise, form the triangle with Canopus, and the third point, the pole, will reveal itself. The wrong way will lead to Aquarius, which is very far away from the celestial pole.