Today's theme answers relate the story of Queen CASSIOPEIA, ruler of ETHIOPIA, who was banished to the sky by POSEIDON for boasting that she was more beautiful than THENEREIDS. Pride goeth, as the British might say. Could SOLACES be a hidden theme answer (Ones who know a lot about the sun?) :)
Five X's appear in the grid placed so that they form the Cassiopeia constellation. Stellar! These NYT puzzle constructors don't myth a TRICK.
Interesting to learn that a YACHT was a pre-1977 presidential perk. Who KNEW? Maybe it was a more AUSTERE time.