The Essential Guide to Astronomy
Lurking in the seemingly changeless constellations are a few inconstant stars that pulse and eclipse. Here are a dozen variables that are easy to observe.
By: John Isles
March 25, 2010
Citizen Science: Projects & Collaboration
Backyard astronomers of all types and experience levels can participate in a real-world science project — and help solve a mystery involving the star Epsilon Aurigae that's puzzled astronomers since 1821.
By: J. Kelly Beatty
September 11, 2009