New: weir-authorAll contenthive-129948hive-196917krzzanhive-166405hive-185836steemhive-183959hive-180932photographyhive-150122hive-188619hive-184714hive-183397hive-144064hive-101145uncommonlabhive-145157bitcoinhive-103599hive-193637hive-193186krsuccesshive-113376hive-103393TrendingNewHotLikersthehway (19)in weir-author • 7 years agoQ&A: Measuring a Black Hole’s Spin and more. Featuring Andy Weir Author of the MartianIn this week’s question show, Fraser explains how astronomers measure the spin rate of black holes, other uses of gravitational slingshots, and why everyone is talking about Patreon.