Side-by-side comparison of the observed (black points) and simulated Sgr streams (blue and red points; left panels, Fardal et al. 2015; right panels, Dierickx & Loeb 2017). The simulated streams have been offset from their original positions to enable easier comparison (by ﹩{\rm{\Delta }}{\tilde{{\rm{\Lambda }}}}_{\odot }=40^\circ ﹩ and ﹩{\rm{\Delta }}{\tilde{{\rm{\Lambda }}}}_{\odot }=70^\circ ﹩ in the top and bottom panels, respectively). The blue and red points show N-body particles stripped off the Sgr dSph galaxy during pericenter passages that happened about 1.3 and 2.7 Gyr ago, respectively. To mimic the uncertainty in distances to PS1 RRab stars, we have added ﹩0.03\times D﹩ of Gaussian noise to distances of N-body particles.