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.
In the Old Testament a Godly man usually lived to be at least 70, while an Ungodly man died earlier. Saul had displeased God, so God would have shortened this. Saul reigned 40 full years and assuming would have been about 25 when he became king, and 65 when he died, this would make him born about 1075BC. This would mean he became king in 1050 BC, thus making Samuel then 55 years old.