In de Sitter space, the Gibbons-Hawking temperature is equal to this quantity divided by two pi. The sum of this quantity’s square and time derivative is expressed in terms of pressure and density in an “acceleration equation” derived from the trace of the Einstein Field Equations. This quantity, whose square appears on one side of the first Friedmann equation, is equal to the ratio of the scale factor and its (15[1])derivative. (15[1])A (15[1])namesake (*) “tension” (10[2])is due to the disagreement over whether this quantity is closer to 68 or 74 kilometers per second per megaparsec. The reciprocal of this quantity gives an estimate for the age of the universe under (10[1])linear expansion. For 10 points, what deceptively-named constant characterizing the “flow” of the universe is named for the same astronomer (10[1])as the precursor of the James Webb Space Telescope? ■END■ (10[1])