THE SHORT ANSWER
From the Sun's surface, light reaches us in about 8 minutes 20 seconds. But getting out of the Sun is the slow part: NASA estimates the energy bounces around inside for about 170,000 years first.
Big facts, for scale
- The Sun is about 150 million km away. Light covers that in about 8 minutes 20 seconds.
- Inside the Sun, energy is passed from particle to particle like a parcel nobody can hold for long. NASA's estimate for the trip out is about 170,000 years. Scientists' estimates vary, and a single photon may take much longer.
- So the sunlight on your face today started its journey before the last woolly mammoths died out (about 10,000 years ago) and before the Great Pyramid was built (about 2560 BC).
Watch the episode
Tiny Human vs. the Sun: Your Sunlight Is 170,000 Years Late goes out on TikTok, Instagram, Facebook and X. Times are shown in yours.
For grown-ups and teachers
Ask: what else happened on Earth while today's sunlight was still inside the Sun? Make a timeline from 170,000 years ago to today.
Sources
- NASA: Sun facts (about 170,000 years through the radiative zone; distance)
- NASA Marshall Solar Physics: the Sun's interior
Facts last checked 4 November 2026. Tiny Human's art and voices are made with AI tools; every fact is checked by a person against the sources above.
