div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=the-typical-perseid-meteor-spectrumhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: The Typical Perseid Meteor Spectrum loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentssitereader031viewer2022020312575068001a28ab0f07ae2272html5thumbnails1jpg width=140 height=200 divp© 1953 Nature Publishing Grouppdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=the-typical-perseid-meteor-spectrumhtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: The Typical Perseid Meteor Spectrum loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentssitereader031viewer2022020312575068001a28ab0f07ae2272html5thumbnails2jpg width=140 height=200 divp© 1953 Nature Publishing Grouppdiv