Космический паспорт

Where the atoms in your body came from

Of a 70 kg body, 45.5 kg is oxygen and 12.6 kg carbon. Everything except hydrogen was forged inside stars.

Only hydrogen came from the Big Bang

Within three minutes of the beginning, hydrogen and helium existed. That was all. No carbon, no oxygen, no iron.

45.5 kg of oxygen — made in stars

Oxygen is 65% of a 70 kg body. It was fused from helium in stellar cores and scattered by supernovae.

12.6 kg of carbon — from red giants

The triple-alpha process binds three helium nuclei into carbon. Without it, carbon-based life could not exist.

Heavier than iron takes catastrophe

Gold and uranium are not made by a star living its life. They require supernovae or neutron-star collisions.

See where your own elements came from
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