In 2023, a team at Caltech’s Palomar Observatory discovered one of these astronomical objects nicknamed “Janus.” Nonradial gravity mode pulsations explain the luminosity variations in one of these objects called HL Tau 76. Leon Mestel derived the relation between these objects’ cooling time and luminosity, allowing them to be used as galactic (10[1])chronometers. Very late thermal pulses cause the formation of these objects’ non-DA spectral class. Nonrelativistic analysis of these objects predicts that their radius is inversely proportional (10[1])to the one-third power (10[2])of their mass. (10[1])Novas occur (-5[1])due to accretion onto (10[1])one of these (10[1])objects (10[3])in cataclysmic variables. Mergers of two of these objects (-5[1])cause type Ia (“one-A”) supernovas. (10[1]-5[3])For 10 points, (-5[2])stars under ten solar masses end (10[1])their lives (-5[1])as what objects whose masses (-5[1])are bounded by the (-5[1])Chandrasekhar (10[1])(“CHAN-druh-SAY-kar”) limit? (10[6])■END■ (10[4]0[2])