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  1. Dictionary
    Sec·ond·ar·y plan·et
    /ˈsekənˌderē ˈplanət/

    noun

    • 1. a satellite of a planet.

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  3. www.space.com › 16080Solar system planets, order and formation: A guide | Space

    Mar 29, 2023 · The order of the planets in the solar system, starting nearest the sun and working outward is the following: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and then the possible...

    • Ceres

      Its elliptical orbit puts the dwarf planet between 2.55...

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      Pluto's so-called demotion from planetary status raises...

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      What is the Oort cloud made of? The Oort cloud is a...

  4. www.nationalgeographic.com › science › articleDid Pluto ever actually stop being a planet? Experts debate.

    Feb 16, 2024 · Based on that, the moon would not be a planet…It's what we call a secondary planet, whereas the Earth is a primary planet…The second thing they said is that it has to be large...

  5. www.bbc.co.uk › bitesize › articlesPlanets of our Solar System - BBC Bitesize

    At the centre is the Sun. Orbiting around the Sun are eight planets with over 100 moons between them, at least five dwarf planets, countless asteroids and the occasional comet. In this Space guide ...

  6. www.yourdictionary.com › secondary-planetSecondary Planet Definition & Meaning | YourDictionary

    Secondary Planet Definition. A moon of a planet .

  7. en.wikipedia.org › wiki › PlanetPlanet - Wikipedia

    The eight planets of the Solar System with size to scale (up to down, left to right): Saturn, Jupiter, Uranus, Neptune (outer planets), Earth, Venus, Mars, and Mercury (inner planets) A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis ...

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  9. assets.press.princeton.edu › chapters › s8247What Is a Planet?

    minor planet. as an asteroid, and a definition of. secondary planet. as “a planet that orbits another planet, a satellite, a moon.” Whoa! The Moon revolves around the Earth; therefore, the Moon must be considered a. secondary planet? Certainly, a secondary planet is some kind of planet just as a sweet potato is some kind of potato.

  10. en.wikipedia.org › wiki › Definition_of_planetDefinition of planet - Wikipedia

    A planet can be an astronomical body that dynamically dominates its region (that is, whether it controls the fate of other smaller bodies in its vicinity) or it is defined to be in hydrostatic equilibrium (it has become gravitationally rounded and compacted).

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