We can only assume that Aristarchus wrote On the Sizes and Distances of the Sun and Moon early in his career, then later on he adopted his hypothesis of a sun centred universe and computed a much more accurate value of the angle subtended by the sun.
Kami ay maaari lamang ipalagay na Aristarchus wrote Sa Sukat at Distances ng Linggo at Buwan ng maaga sa kanyang karera, pagkatapos ay sa susunod siya pinagtibay ang kanyang teorya ng isang Linggo center universe at computed ng isang mas tumpak na halaga ng mga anggulo subtended ng Linggo.