Conjunction

Conjunction of two heavenly bodies occurs when the two are in the same meridian. If at the same time they have the same altitude they will be in a line with the earth. A body is in conjunction with the sun when it is in the same line with the sun and on the same side of the earth as the sun. It is in opposition when in the same line but on the other side of the earth. Thus the transit of Venus is the position of conjunction of that planet with the sun.