DIO contents&links or Free Booklets
Editorial Board
Instructions for authors
Subscribing to DIO
DIO's Thousand-Dollar Prizes
About DIO
Eminent scholars' comments on DIO
Ancient Star Catalog
Dennis Rawlins
Farnese Globe
Galileo’s Observations of Jupiter’s Moons
Opere Vol. III part 2 (translation by Charles J. Donovan)
Polar ExControversy
Royal Astron Soc-funded gleanings from RGO Neptune File
DIO Rules for Written Debates
Aubrey Diller's 1984 Completion of Text-Establishment of Ptolemy's Geography: Book 8