Time Dilation Visualized

I do the relativistic math behind Project Hail Mary — time dilation, mass ratios, coast phases, and the relativistic rocket equation with astrophage. How long would it take to reach Alpha Centauri, Tau Ceti, Betelgeuse, Andromeda and the edge of the observable universe under constant 1.5 g acceleration?

We also look at Andy Weir's mass ratio mistake and the astrophage infection range problem, visualising the spread using the AT-HYG stellar catalog.

Chapters

• 00:00 — Intro
• 01:00 — Time dilation
• 06:18 — Mass ratios
• 08:34 — Astrophage infection range