2min chapter

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Moonmoons, Gravitons, and More!

StarTalk Radio

CHAPTER

The Nebular Hypothesis

The first indication that maybe we were onto something was in the mid 1700s, like the literal exact mid 1700s. Two people independently Laplace, a mathematician, and the philosopher Immanuel Kant came up with what today we call the nebular hypothesis. What they were imagining was that if you had a gas cloud, because there's gas all over the galaxy, how might that happen? So if a gas is kind of rarefied and thin, so you got to sort of collapse it so that it can become solid stuff.

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