(a) Animation 2a corresponds to Fig. 2a of Friedman+2013 for the same case as in Animation 1. Past light cones are shown from events A (red), B (blue), and the present time on Earth (gray outer cone). Events A and B appear on opposite sides of the sky as seen from Earth (α = 180 degrees), and the event redshifts z_A and z_B are changed to maintain the condition that their past light cones intersect at the big bang (τ_AB=0). Animation 1 is equivalent to a slice through Animation 2a along the x-axis.

(b) Animation 2b shows the view in the τ=0 plane for the same case from Animations 1 and 2a.