Variable

<p>&nbsp;</p><p style="text-align: justify; font-size: 11px; line-height: 14px; margin: 0px 0px 14px; padding: 0px; color: rgb(0, 0, 0); font-family: Arial, Helvetica, sans; "><span style="font-family:verdana,geneva,sans-serif;"><span style="font-size: 12px;">A star is classified as variable if its brightness as seen from Earth changes over time, whether the changes are due to variations in the star&#39;s actual luminosity or to variations in the amount of the star&#39;s light that is blocked from reaching Earth.&nbsp; The <a href="http://www.aavso.org">AAVSO</a> has more information on variable stars.&nbsp; </span></span></p><div>&nbsp;</div>

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