Description acceptable. Although this quantity doesn’t increase opacity, red stellar populations have higher values of it, making it degenerate with metallicity. Kelvin and Helmholtz were off by many orders of magnitude when calculating the Sun’s (10[1])value of this quantity. (-5[1])Dimensional analysis (10[1])can sketchily (-5[1])justify (-5[2])that a form of this quantity is about one over H-nought. (10[1])Low-mass galaxies that are also [emphasize] (10[1]-5[1])low in this (-5[1])quantity are the main targets of (10[1])JWST. (-5[1])Blue (-5[1])stars (-5[1])have relatively low (-5[4])values of this (-5[4])quantity (-5[1])when leaving the (-5[1])main sequence. Radiometric methods of determining this quantity use the (-5[1])half-life of known (10[1])isotopes. For 10 (10[1])points, the (10[1])universe’s value of (10[1])what quantity is about (10[2])13.7 (10[3])billion (10[1])years? (10[22]0[1])■END■