nebular hypothesis
noun
: a hypothesis in astronomy: the solar system has evolved from a hot gaseous nebula
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Beginning around 1860, Kelvin and other physicists started estimating the ages of the Earth and Sun using the nebular hypothesis proposed around 1750 by Immanuel Kant and Pierre Laplace.
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Mano Singham, Scientific American, 5 Sep. 2021
For some quick context: Ever since Immanuel Kant introduced his nebular hypothesis in 1755, scientists have strongly suspected that planets form in swirling clouds around newborn stars.
—Corey S Powell, Discover Magazine, 6 Nov. 2014
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Mano Singham, Scientific American, 5 Sep. 2021
For some quick context: Ever since Immanuel Kant introduced his nebular hypothesis in 1755, scientists have strongly suspected that planets form in swirling clouds around newborn stars.
—Corey S Powell, Discover Magazine, 6 Nov. 2014
Cite this Entry
“Nebular hypothesis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nebular%20hypothesis. Accessed 10 Sep. 2025.
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