page_title: 1609
section_title: Events
hierarchical_section_title: 1609 / Events
caption_attribution_description: Ελληνικά: Ο el:Γαλιλαίος Γαλιλέι, πορτρέτο από τον Οττάβιο Λεόνι. English: Galileo Galilei. Portrait by Ottavio Leoni. Français&#160;: Portrait au crayon de Galileo Galilei réalisée par leoni. Português: Galileu Galilei. 中文: Galileo Galilei. Portrait in crayon by Leoni. Български: Галилео Галилей. Íslenska: Galileo Galilei hóf rannsóknir sínar með stjörnukíki þetta ár og gaf þær út árið eftir. Brezhoneg: Galileo Galilei. Ido: Galileo Galilei. Taqbaylit: Galileo Galilei. Türkçe: Ottavio Leoni tarafından yapılan Galileo Galilei portresi (1578-1630).
context_page_description: 1609 was a common year starting on Thursday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1609th year of the Common Era and Anno Domini designations, the 609th year of the 2nd millennium, the 9th year of the 17th century, and the 10th and last year of the 1600s decade. As of the start of 1609, the Gregorian calendar was 10 days ahead of the Julian calendar, which remained in localized use until 1923.
caption: August 25: Galileo Galilei demonstrates his first telescope.
exif: {"Image XResolution": "100", "Image YResolution": "100", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "GIMP 2.10.6", "Image DateTime": "2018:09:07 14:43:36", "Thumbnail ImageWidth": "224", "Thumbnail ImageLength": "256", "Thumbnail BitsPerSample": "[8, 8, 8]", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail PhotometricInterpretation": "6", "Thumbnail SamplesPerPixel": "3", "Thumbnail JPEGInterchangeFormat": "230", "Thumbnail JPEGInterchangeFormatLength": "9754"}