How Are Planets Made? New Theories Are Taking Shape. - Quanta Magazine

Observations of faraway planets have forced a near-total rewrite of the story of how our solar system came to be.

Pebble accretion is now a favored theory for how gas giant cores are made, and many astronomers argue it may be taking place in those ALMA images, allowing giant planets to form in the first few mill… [+6643 chars]

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