NGC 4603 &amp; Variable Cepheids (HST 1999)
NASA, ESA and J. Newman (University of California at Berkeley)
<a rel="nofollow" class="external free" href="http://hubblesite.org/newscenter/archive/releases/1999/19/image/c/">http://hubblesite.org/newscenter/archive/releases/1999/19/image/c/</a>