In de Sitter space, the Gibbons-Hawking temperature is proportional to this quantity. The square of this quantity divided by its past value may be expressed as a sum of four powers with coefficients denoted by capital omegas. (-5[1])The critical density varies with the square (15[1])of this quantity, which (-5[1])is added to (15[2])this quantity’s time derivative in one form of the Friedmann (-5[1])acceleration (15[1])equation. (15[1])A namesake “tension” is due to the disagreement (15[2])over whether (15[1])this (15[3])quantity, (15[4])which is defined (15[1])as the ratio of the (*) scale factor (10[1])and its derivative, (10[1]-5[2])is closer (10[1])to 68 (10[1])or (10[1])74 (-5[1])kilometers (10[3])per second (10[1])per (10[1])megaparsec. (10[2]-5[1])The reciprocal (10[1])of this quantity (10[2])gives (-5[1])an estimate (10[1])for the age of the universe (10[3])under (-5[1])linear (10[3])expansion. (10[1]-5[1])For 10 points, what deceptively-named constant characterizing the “flow” of the universe (-5[1])is named for the same astronomer as the precursor of the James (10[2]-5[1])Webb (10[2])Space (10[1])Telescope? (10[3])■END■ (10[7])