For eclipse enthusiasts, amateur astronomers and those with just a passing interest in the Aug. 21 coast-to-coast solar eclipse, look no further than your web browser or smartphone to learn how to make the most of this rare and spectacular event.

Three smartphone/tablet apps stand out: Eclipse Safari (free), Solar Eclipse by Redshift ($1.99), and Smithsonian Eclipse 2017 (free). All three are available for Android and iOS. … http://buff.ly/2uu6hJg