Reviews Cosmic Challenge: The Ultimate Observing List for Amateurs by Philip S. Harrington By Science News April 8, 2011 at 9:48 am - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print This guide to observing the heavens beckons backyard astronomers to find 187 targets using instruments ranging from binoculars to monster scopes. Cambridge Univ. Press, 2011, 469 p., $45.