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  2. Planetesimal Hypothesis - HowStuffWorks

    science.howstuffworks.com/dictionary/astronomy-terms/planetesimal-hypothesis...

    Learn about the discredited theory that planets formed from small bits of matter (planetesimals) pulled out by a near-collision with a passing star. Find out why this theory was debunked and what are the alternative explanations for the origin of the solar system.

  3. Planetesimal is a term for the small bodies that coalesced to form planets in the solar system. Learn about the nebular hypothesis, the differences between rocky and icy planetesimals, and the remnants of planetesimals in the asteroid belt and beyond.

  4. Planetesimal - Wikipedia

    en.wikipedia.org/wiki/Planetesimal

    Planetesimals are solid objects that form in protoplanetary disks and debris disks and aid the study of planet formation. Learn about the planetesimal hypothesis, the mechanisms of collisions and sticking, and the surviving planetesimals in the Solar System.

  5. Chamberlin–Moulton planetesimal hypothesis - Wikipedia

    en.wikipedia.org/wiki/Chamberlin–Moulton_planetesimal_hypothesis

    The ChamberlinMoulton planetesimal hypothesis was proposed in 1905 by geologist Thomas Chrowder Chamberlin and astronomer Forest Ray Moulton to describe the formation of the Solar System. It was proposed as a replacement for the Laplacian version of the nebular hypothesis that had prevailed since the 19th century.

  6. The Origin of the Solar System - Scientific American

    www.scientificamerican.com/article/the-origin-of-the-solar-system

    The Planetesimal Hypothesis.This hypothesis has been formulated by Chamberlin and Moulton1 to avoid the serious defects of the Nebular Hypothesis. It really consists of two separate...

  7. Origin of the Solar System - University of Oregon

    pages.uoregon.edu/jschombe/ast121/lectures/lec23.html

    The protoplanet hypothesis explains the formation of the Solar System by the accretion of planetesimals, which are small bodies of rock and ice. Planetesimals are the key to the formation of the terrestrial and jovian planets, as well as the moons and comets.

  8. solar system: The Planetesimal and Tidal Theories - Infoplease

    www.infoplease.com/.../astronomy/solar-system/the-planetesimal-and-tidal-theories

    Learn about the planetesimal and tidal theories of solar system formation, which involve a star's encounter or collision with the sun. Compare them with the nebular hypothesis and the angular momentum problem.

  9. Planetesimals - Universe Today

    www.universetoday.com/35974

    Planetesimals are small celestial bodies formed during the creation of planets. Learn about the planetesimal hypothesis, how planetesimals became planets, moons, comets, and more.

  10. The Origin of the Solar System - New Mexico State University

    astronomy.nmsu.edu/kurt/Astronomy110G/Lectures/18.Origins-I.pdf

    Learn about the various theories and evidence for the formation of the Sun and the planets, including the encounter hypothesis that involves a near miss with a passing star. Compare the strengths and weaknesses of different models and their predictions for the solar system.

  11. The origin of the planetesimal theory - Springer

    link.springer.com/content/pdf/10.1007/bf00930932.pdf

    A historical article by Stephen G. Brush on the planetesimal theory proposed by T. C. Chamberlin and F. R. Moulton in 1905. They argued that planets formed by accretion of cold solid particles extracted from the Sun by a passing star.