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  2. List of Solar System objects by size - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System...

    For the giant planets, the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure. [ 11 ] Because Sedna and 2002 MS 4 have no known moons, directly determining their mass is impossible without sending a probe (estimated to be from 1.7x10 21 to 6.1×10 21 kg for Sedna [ 12 ] ).

  3. Planetary mnemonic - Wikipedia

    en.wikipedia.org/wiki/Planetary_mnemonic

    Before 2006, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto were considered as planets. Below is a partial list of these mnemonics: "Men Very Easily Make Jugs Serve Useful Needs, Perhaps" – The structure of this sentence, which is current in the 1950s, suggests that it may have originated before Pluto's discovery.

  4. Solar System - Wikipedia

    en.wikipedia.org/wiki/Solar_System

    The outer planets Jupiter, Saturn, Uranus and Neptune, compared to the inner planets Earth, Venus, Mars, and Mercury at the bottom right The four outer planets, called giant planets or Jovian planets, collectively make up 99% of the mass orbiting the Sun. [ h ] All four giant planets have multiple moons and a ring system, although only Saturn's ...

  5. Lesson Planet - Wikipedia

    en.wikipedia.org/wiki/Lesson_Planet

    Education Planet dba Lesson Planet, is a for-profit education company based in Santa Barbara, California. Lesson Planet provides teacher-reviewed resources for use by teachers and parents. Its products are designed to supplement traditional and non-traditional education from kindergarten through the 12th grade.

  6. Planetary symbols - Wikipedia

    en.wikipedia.org/wiki/Planetary_symbols

    The origins of the planetary symbols can be found in the attributes given to classical deities. The Roman planisphere of Bianchini (2nd century, currently in the Louvre, inv. Ma 540) [2] shows the seven planets represented by portraits of the seven corresponding gods, each a bust with a halo and an iconic object or dress, as follows: Mercury has a caduceus and a winged cap; Venus has a ...

  7. Astronomical symbols - Wikipedia

    en.wikipedia.org/wiki/Astronomical_symbols

    Medieval depiction of the zodiac and the classical planets. The planets are represented by seven faces. Symbols for the classical planets appear in many medieval Byzantine codices in which many ancient horoscopes were preserved. [2] The written symbols for Mercury, Venus, Jupiter, and Saturn have been traced to forms found in late Greek papyrus ...

  8. Planet Cosmo - Wikipedia

    en.wikipedia.org/wiki/Planet_Cosmo

    Planet Cosmo is a British-Irish children’s animated television series about space. The series formerly aired on RTÉjr. [1] Premise

  9. Planet - Wikipedia

    en.wikipedia.org/wiki/Planet

    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 generally required to be in orbit around a star, stellar remnant, or brown dwarf, and is not one itself. [1]