div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=-chapter-22-origin-of-mod-em-as-tronomy-section-221-early-astronomy-this-sectionhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: · Chapter 22 Origin Of Mod em As tronomy Section 221 Early Astronomy This section outlines the early history especially changing ideas Reading Strategy loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentssitereader031viewer20220226005b402c0c7f8b9a91078cfd9bhtml5thumbnails1jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=-chapter-22-origin-of-mod-em-as-tronomy-section-221-early-astronomy-this-sectionhtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: · Chapter 22 Origin Of Mod em As tronomy Section 221 Early Astronomy This section outlines the early history especially changing ideas Reading Strategy loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentssitereader031viewer20220226005b402c0c7f8b9a91078cfd9bhtml5thumbnails2jpg width=140 height=200 divdiv