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One of the earliest theories for the formation of the planets was called the encounter hypothesis. In this scenario, a rogue star passes close to the Sun about 5 billion years ago. Material, in the form of hot gas, is tidally stripped from the Sun and the rogue star.
The Encounter Hypothesis (Buffon 1745) Scenario: 1. A “near miss” encounter occurs between the Sun and a passing star. 2. Material is pulled from the stellar surfaces by tidal forces. 3. Material cools and condenses to form planetary bodies. Principal Shortcoming: This Requires a highly unlikely event
As our solar system formed, the nebular cloud of dispersed particles developed distinct temperature zones. Temperatures were very high close to the center, only allowing condensation of metals and silicate minerals with high melting points.
The Encounter Theories of the Origin of the Solar System was published in A Source Book in Astronomy and Astrophysics, 1900–1975 on page 182.
Feb 1, 2000 · Early theories. Based on ideas and observations by Descartes, Kant and Herschel, Pierre Laplace (1796) put forward the first really scientific theory (summarized in figure 1 ). A slowly spinning cloud of gas and dust cooled and collapsed under gravity. As it collapsed, so it spun faster and flattened along the spin axis.
Since the seventeenth century, philosophers and scientists have been forming hypotheses concerning the origins of our Solar System and the Moon and attempting to predict how the Solar System would change in the future.
Jul 2, 2024 · Early scientific theories. The Kant-Laplace nebular hypothesis. Kant’s central idea was that the solar system began as a cloud of dispersed particles. He assumed that the mutual gravitational attractions of the particles caused them to start moving and colliding, at which point chemical forces kept them bonded together.
