Factopus

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LESSON 1 · Galaxies & the Cosmic Web

PAUSE TO THINK

How long does it take the Sun to orbit the Milky Way once?

About 225 million years

The Sun travels at 230 km/s around the galactic center, completing one orbit in roughly 225 million years. This means the last time the Sun was in its current position relative to the galaxy, dinosaurs had not yet evolved.

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