Cassiopeia is a northern hemispheric constellation which means it can't be seen easily or at all from the southern hemisphere. The brightest star in Cassiopeia is Schedar. There are 13 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site.
King Solomon lived to be 80 years old. King Solomon is most known  for asking for and receiving the gift of 'wisdom' to rule God's  peoples.
Conservatively, therefore, the period between when he was anointed and the time he actually began to officially rule was fifteen years. Like the rest of us King David suffered most of his life because of his own sins (adultery with Bathsheba, murder of Uriah her husband, and generally not disciplining his children).