Only parts were ever published, probably most was never written, but again there was some remarkable insights on astronomy and calendar reform which Bacon had formed after making observations.
Bahagi pa lamang ay nai-publish, malamang karamihan ay hindi nakasulat, ngunit muli may ilang kapuna-puna pananaw sa astronomy, at magbago ng kalendaryo na Bacon had nabuo pagkatapos ng paggawa ng mga obserbasyon.