Solar brightness variations in the past centuries.} Solar
variability has been the subject of intensive studies in the past 15 years due to
suggestions of possible role of solar forcing in the Earth climate
change. Limited time
baseline of accurate observations of solar brightness change has hindered the
research. By comparing the Sun with a sample of
stellar analogs, we were able to expand
the time base and to reconstruct the history of solar brightness
variations since the Maunder Minimum (ca. A.D. 1660-1710) (<A 
HREF="http://adsbit.harvard.edu/cgi-bin/nph-article_query?1994ApJ%2E%2E%2E427L%2E111Z
"> 	 Zhang et al. 1994</A>).