Death Of A Megasun

The "hypernovae" that marked the death of megasuns have not yet been observed, but models suggest they were astonishingly violent. In one scenario Cleft), the core of the star collapses to form a black hole that "eats" the rest of the star from inside. In another, the entire star becomes a vast nuclear reactor for a few moments, generating heavy elements that are scattered across the universe by the vast explosion.

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The universe at 1.3 billion years old

Individual galaxies are now forming within the crowded filaments. Photographs of the early universe show an excess of "blue" galaxies, rich in dust and young stars, at this time.

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