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  2. Johannes Kepler - Wikipedia

    en.wikipedia.org/wiki/Johannes_Kepler

    Kepler has acquired a popular image as an icon of scientific modernity and a man before his time; science popularizer Carl Sagan described him as "the first astrophysicist and the last scientific astrologer". [125] The debate over Kepler's place in the Scientific Revolution has produced a wide variety of philosophical and popular treatments.

  3. Celestial mechanics - Wikipedia

    en.wikipedia.org/wiki/Celestial_mechanics

    The earliest use of modern perturbation theory was to deal with the otherwise unsolvable mathematical problems of celestial mechanics: Newton's solution for the orbit of the Moon, which moves noticeably differently from a simple Keplerian ellipse because of the competing gravitation of the Earth and the Sun.

  4. Kepler's laws of planetary motion - Wikipedia

    en.wikipedia.org/wiki/Kepler's_laws_of_planetary...

    The orbits are ellipses, with foci F 1 and F 2 for Planet 1, and F 1 and F 3 for Planet 2. The Sun is at F 1.; The shaded areas A 1 and A 2 are equal, and are swept out in equal times by Planet 1's orbit.

  5. History of Solar System formation and evolution hypotheses

    en.wikipedia.org/wiki/History_of_Solar_System...

    The history of scientific thought about the formation and evolution of the Solar System began with the Copernican Revolution. The first recorded use of the term " Solar System " dates from 1704. [ 1 ] [ 2 ] Since the seventeenth century, philosophers and scientists have been forming hypotheses concerning the origins of the Solar System and the ...

  6. Orbit - Wikipedia

    en.wikipedia.org/wiki/Orbit

    An animation showing a low eccentricity orbit (near-circle, in red), and a high eccentricity orbit (ellipse, in purple). In celestial mechanics, an orbit (also known as orbital revolution) is the curved trajectory of an object [1] such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an object or position in space such ...

  7. Kepler orbit - Wikipedia

    en.wikipedia.org/wiki/Kepler_orbit

    In celestial mechanics, a Kepler orbit (or Keplerian orbit, named after the German astronomer Johannes Kepler) is the motion of one body relative to another, as an ellipse, parabola, or hyperbola, which forms a two-dimensional orbital plane in three-dimensional space. A Kepler orbit can also form a straight line.

  8. Pebble accretion - Wikipedia

    en.wikipedia.org/wiki/Pebble_accretion

    The velocity of gas then becomes super-keplerian outside the gap stopping the inward drift of pebbles and ending pebble accretion. [4] Detailed simulations, based on first-principle calculations, indicate that in typical protoplanetary disks the formation time of giant planets via pebble accretion is a few to several million years, comparable ...

  9. Epitome Astronomiae Copernicanae - Wikipedia

    en.wikipedia.org/wiki/Epitome_Astronomiae...

    Kepler's Figure 'M' from the Epitome, showing the world as belonging to just one of any number of similar stars Diagram of the phases of Venus as viewed by an observer on Earth Epitome astronomiae copernicanae (1618)

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