▲ 1 r/spacequestions
Twin Paradox: If time dilation is symmetric, how does Earth "gain" time during the turnaround?
I’m confused about the symmetry in the Twin Paradox.
If I travel at 0.87c (\gamma=2), I see Earth’s clock running at half-speed. This is true for both the outbound and the inbound leg of the trip.
If Earth's clock is running slow from my perspective during the entire journey (out and back), how is it possible that Earth is 20 years older when I return, while I’ve only aged 10?
Does Earth’s time "jump forward" during my turnaround? And if motion is relative, why doesn't this "jump" happen for me from Earth's perspective? Is it purely because I'm the one undergoing acceleration?
Or is there any video that explains this in an easy manner?
u/ConTrail47 — 5 hours ago