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.
David died at the age of 70 in 971 BC making him born 1041BC It is estimated by one authority that David about 20 years old when he was annointed to be the next king by Samuel, while another authority has him 22 years old, but splitting the difference and making him 21 - the age of majority - would be far more likely.