[1]^Harper, Douglas.astrology. Online Etymology Dictionary. Retrieved 6 December 2011. "Differentiation between astrology and astronomy began late 1400s and by 17c. this word was limited to "reading influences of the stars and their effects on human destiny.""
[2]^astrology, n.. Oxford English Dictionary Second. Oxford University Press. 1989; online version September 2011. "In Old French and Middle English astronomie seems to be the earlier and general word, astrologie having been subseq. introduced for the 'art' or practical application of astronomy to mundane affairs, and thus gradually limited by 17th cent. to the reputed influences of the stars, unknown to science. Not in Shakespeare."
同度相(parallel,或是平行)以及反同度相(antiparallel or contraparallel,亦稱反向平行)是其他兩個相位,這是指為在赤緯度之上方或是黃道之下方。祂們被認為是具強而有力影響的相位,雖然沒有太多已經從事研究這些特定的相位的考察資料。
同度相:相同度數±1度12弧分。這類似合相,但通常提供有力的能量。
反同度相:相反度數±1度12弧分。被描述類似對分相,然而能量較弱。