The Nebular Hypothesis

Descarte's Statement

Dec 12, 1664

Rene Descartes states that large vortexes condensed to make the planets and the sun in his book Le Monde. "René Descartes." Science and Its Times. Ed. Neil Schlager and Josh Lauer. Vol. 3. Detroit: Gale, 2001. Science in Context. Web. 12 Dec. 2013. "Rene Descartes." Gale Science in Context. Detroit: Gale, 2010. Science in Context. Web. 12 Dec. 2013. "Solar system forming." UXL Encyclopedia of Science. U*X*L, 2010. Science in Context. Web. 12 Dec. 2013.

Swedenborgh's Hypothesis

Dec 12, 1734

Emanuel Swedenborgh first hypothesized that the solar system began as a nebula. "Planetary nebula NGC 7027." Earth Sciences for Students. Detroit: Macmillan Reference USA, 2010. Science in Context. Web. 12 Dec. 2013. "Solar System." World of Earth Science. Ed. K. Lee Lerner and Brenda Wilmoth Lerner. Detroit: Gale, 2010. Science in Context. Web. 12 Dec. 2013.

Kant discusses his hypothesis

Dec 12, 1775

Immanual Kant, a German Philosopher, discussed the idea of the solar nebula hypothesis. He also stated that the Milky Way was lens shaped and that nebulous stars are really galaxies, "Immanuel Kant." Science and Its Times. Ed. Neil Schlager and Josh Lauer. Vol. 4: 1700 to 1799. Detroit: Gale, 2000. 364. Gale Virtual Reference Library. Web. 12 Dec. 2013. "Immanuel Kant." Gale Science in Context. Detroit: Gale, 2010. Science in Context. Web. 12 Dec. 2013.

The Collision Hypothesis

Dec 12, 1778

The Collision Hypothesis, created by Count Georges Louis Leclerc de Buffon, states that the solar system may have been created by the collision of two stars or comets and the debris became the planets and sun. Luft, Eric V. D. "Laplace Theorizes That the Solar System Originated from a Cloud of Gas." Science and Its Times. Ed. Neil Schlager and Josh Lauer. Vol. 4: 1700 to 1799. Detroit: Gale, 2000. 285-287. Gale Virtual Reference Library. Web. 12 Dec. 2013. "NASA's Spitzer Detects Comet Storm

Pierre Simon de Laplace and his Book

Dec 12, 1796

A French mathematician Pierre Simon de Laplace published his book "the System of the World' which includes his nebular hypothesism, that the solar system was a whirling cloud of gas at first. Luft, Eric V. D. "Laplace Theorizes That the Solar System Originated from a Cloud of Gas." Science and Its Ti "Pierre-Simon de Laplace." Gale Science in Context. Detroit: Gale, 2010. Science in Context. Web. 12 Dec. 2013.

The Planetesimal Theory

Dec 12, 1916

Thomas Chrowder Chamberlin created the Planetesimal theory, which was spawned by an attempt to test the Nebular hypothesis. It stated that the planets were formed when materials were expelled from the sun, they grouped together to form tiny "planetesimals" which then formed the planets. "Thomas Chrowder Chamberlin." Encyclopedia of World Biography. 2nd ed. Vol. 3. Detroit: Gale, 2004. 415-416. Gale Virtual Reference Library. Web. 12 Dec. 2013. "Planets orbit the Sun." Experiment Central. U*X*

The Tidal hypothesis

Dec 12, 1919

Sir James Hopwood Jeans creates the Tidal Nebular theory that disproves the Kant-Laplace Nebular theory. "Sir James Hopwood Jeans." Encyclopedia of World Biography. 2nd ed. Vol. 8. Detroit: Gale, 2004. 235-236. Gale Virtual Reference Library. Web. 12 Dec. 2013.

Nebular Hypothesis Revived

Dec 12, 1944

Carl Friedrich von Weizsäcker, a German philosopher and physicist, argued that the nebular hypothesis was credible. His views popularized the hypothesis at the time. Luft, Eric V. D. "Laplace Theorizes That the Solar System Originated from a Cloud of Gas." Science and Its Times. Ed. Neil Schlager and Josh Lauer. Vol. 4: 1700 to 1799. Detroit: Gale, 2000. 285-287. Gale Virtual Reference Library. Web. 12 Dec. 2013.