During this period Morin published a defence of Aristotle (1624) and he also worked on optics. However astrology remained his main interest although he worked with Gassendi on observational astronomy.
Panahon na ito Morin-publish ng isang depensa ng Aristotle (1624) at siya rin ay nagtrabaho sa optika. Subalit Astrolohiya naiiwan ang kanyang mga pangunahing interes bagama't siya nagtrabaho sa Gassendi sa pagmamatyag astronomy.