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What is a nebula, really?

Clouds of gas and dust where stars are born and die.

What is a nebula, really?

A nebula is a vast cloud of gas and dust, sometimes lit by young stars and sometimes dark enough to hide them. The pink glow in this photograph is hydrogen excited by newborn starlight.

See one yourself

The Orion Nebula is visible to the naked eye as a faint smudge in winter.

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