后座

empress's throne / (fig.) first place in a feminine competition

back seat / pillion

empress / queen / (archaic) monarch / ruler

back / behind / rear / afterwards / after / later / post-

seat / base / stand / (archaic) suffix used in a respectful form of address, e.g. 师座|师座[shi1 zuo4] / CL:個|个[ge4] / classifier for buildings, mountains and similar immovable objects

Cassiopeia (constellation)