Reflective telescope

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If astronomers could look back in time, one thing they'd love to see is our solar system as it formed, 4.6 billion years ago.
Now they can, in a way.
By looking at sun-like stars in their infancy, researchers have used a powerful telescope and a new bag of tricks to peer at planet-formation under way.
The result: Three wildly different setups, suggesting our solar system is perhaps neither unique nor all that strange.
When a star is born, there's often a leftover cloud of gas and dust that flattens out into a thin disk

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