Is Dust the Best Thing in the Universe? Part 4: We Owe Dust Our Lives

belaUniverse Today11 hours ago1 Views

The protoplanetary disk around the young star HL Tau, imaged by ALMA. The dark gaps are where dust has accumulated into proto-planets, with the bright rings showing the dust grains that haven't yet combined into anything larger. (CC BY 4.0, ALMA / ESO / NAOJ / NRAO)

No dust, no way to cool a collapsing gas cloud. No way to cool it, no stars. No dust, no first rung on the ladder from grain to pebble to planet. The substance I spent two articles complaining about turns out to be the substance that makes me possible.

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