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  2. Formation and evolution of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Formation_and_evolution_of...

    There is evidence that the formation of the Solar System began about 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. [1] Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.

  3. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    The Solar System[d]is the gravitationally boundsystem of the Sunand the objects that orbitit.[11] It was formed about 4.6 billion years agowhen a dense region of a molecular cloudcollapsed, forming the Sun and a protoplanetary disc. The Sun is a typical star that maintains a balanced equilibriumby the fusionof hydrogen into helium at its core, releasing this energy from its outer photosphere ...

  4. Solar System model - Wikipedia

    en.wikipedia.org/wiki/Solar_System_model

    Solar System model. Solar System models, especially mechanical models, called orreries, that illustrate the relative positions and motions of the planets and moons in the Solar System have been built for centuries. While they often showed relative sizes, these models were usually not built to scale. The enormous ratio of interplanetary ...

  5. File:Solar System size to scale.svg - Wikipedia

    en.wikipedia.org/wiki/File:Solar_System_size_to...

    File:Solar System size to scale.svg. Size of this PNG preview of this SVG file: 512 × 288 pixels. Other resolutions: 320 × 180 pixels | 640 × 360 pixels | 1,024 × 576 pixels | 1,280 × 720 pixels | 2,560 × 1,440 pixels. Original file ‎ (SVG file, nominally 512 × 288 pixels, file size: 88 KB) This is a file from the Wikimedia Commons.

  6. Outline of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Outline_of_the_Solar_System

    Outline of the Solar System. The following outline is provided as an overview of and topical guide to the Solar System: Solar System – gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the planets (including Earth ...

  7. List of possible dwarf planets - Wikipedia

    en.wikipedia.org/wiki/List_of_possible_dwarf_planets

    List of possible dwarf planets The number of dwarf planets in the Solar System is unknown. Estimates have run as high as 200 in the Kuiper belt [1] and over 10,000 in the region beyond. [2] However, consideration of the surprisingly low densities of many large trans-Neptunian objects, as well as spectroscopic analysis of their surfaces, suggests that the number of dwarf planets may be much ...

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