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Could life spread between stars?

Hypothetical one-origin model with short biological hops, orbiting stars and galactic differential rotation. This is not an observation of extraterrestrial life or a calibrated probability forecast.

On a phone, swipe sideways across the diagram to explore both panels or rotate your screen.

In the left panel, each tiny blue point marks a representative star from a shared chemical birthplace. On the right, the positions of successfully seeded worlds are shown relative to the Sun: left/right indicates displacement along the galactic orbit; up/down indicates radial displacement. The axes use different scales.