大约每过15年，这两颗行星会在年度内太阳弧推运中相互间形成相位。

About every 15 years the two planets will form mutual aspects by solar arc within a year of each other.

youdao

我也不准备用太阳弧、推运、流年等方式去验证这个发现，因为我没有时间；

I did not even try to confirm these "findings" with solar arcs, progressions, transits etc. , as I had no time for it;

youdao