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 Pictures courtesy David Spergel 
Ellen Zweibel, Scott Tremaine, and Neil Tyson 
Arthur Davidsen and Kathryn Johnston 
Ue-Li Pen, Masataka Fukugita, and Russell Kulsrud 
Rich Gott, Jeremy Goodman, and Douglas Richstone 
Myrna Jenkins, Ed Jenkins, and Jerry Ostriker 
Larry Smarr and Jerry Ostriker 
Gabriel Ostriker and Dick McCray 
Rebecca Ostriker, |