From the August 2009 issue

Glenn Chaple’s Observing Basics: Predicting Neptune’s existence

October 2009: Discovering the eighth planet was a notable application of physics and mathematics.
By | Published: August 21, 2009 | Last updated on May 18, 2023

Since January, this column has celebrated the triumphs of Galileo, who first turned a telescope on the heavens 4 centuries ago. Rather than look at another of his hits, let’s examine one of Galileo’s misses.