commesso next year and 2009 we will be celebrating an anniversary of the publication or observations of giglio use of the telescope for astronomical purposes. galileo was and of course the only one to look at the marin. he may have been the first one to use a telescope but the book on this side of the table is from the 19th century, when telescopes' had improved a lot, and there were two scientists in england who published this book on the moon, based on their observations with the telescope. but although they could photograph the moon, they couldn't take a detailed observations with their telescope and photography, so they made a model based on their observations with the telescope and then made photographs of those observations. so this is the fault of copernicus named after the author we start with with very detailed observations that look like they are actual photographs of the moon but in fact photographs -- the book behind it is the same century as galileo. this is isaac newton's famous principia known by the third word of the title of the full title is mathematical principles of natural