cepheids http://kvnf.org en Western Slope Skies 7/19/13 http://kvnf.org/post/western-slope-skies-71913 <p><em>This is the second in a series on Women in Astronomy.&nbsp;</em></p><p></p><p><span style="line-height: 1.5;">In the early </span>1900s<span style="line-height: 1.5;">, Henrietta Swan </span>Leavitt<span style="line-height: 1.5;"> discovered a characteristic of certain variable stars that is still used today to measure astronomical distance.&nbsp;</span></p><p> Fri, 19 Jul 2013 14:53:30 +0000 Black Canyon Astronomical Society 13333 at http://kvnf.org Western Slope Skies 7/19/13