(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 zA and zB are changed to maintain the condition that their past light cones intersect at the big bang (τAB=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.

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Last Updated: Andrew Samuel Friedman, 6/2017

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This material is based upon work supported by the National Science Foundation under NSF Award #1056580 (2012-2014) through an NSF Science, Technology, and Society Postdoctoral Fellowship at MIT and the NSF INSPIRE program via NSF Award #1541160 (2015-2020).

Original animations are shared under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 US License

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