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Small planet radius gap

Small planet radius gap

Scarcity of planets between 1.5 times and twice Earth's radius.

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Wikipedia views per dayLast 30 days 776

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Readers' pathsAug 2026 – Oct 2026

Readers go next to

Share of the 368 clicks on its links

  1. Super-Earth

    Type of exoplanet larger than Earth.

    16%

  2. Sub-Neptune

    Planet smaller than Neptune with a low density envelope.

    13%

  3. Stellar classification

    Classification of stars based on spectral properties.

    8.4%

  4. Earth analog

    Planet with environment similar to Earth's.

    6.3%

  5. Exoplanet

    Planet outside of the Solar System.

    3.3%

Readers come from

Share of the 1,097 readers arriving from another article

  1. Sub-Neptune

    Planet smaller than Neptune with a low density envelope.

    74%

  2. K2-18b

    Sub-Neptune orbiting the red dwarf K2-18.

    6.2%

  3. Mega-Earth

    Supermassive terrestrial planet.

    3.9%

  4. Super-Earth

    Type of exoplanet larger than Earth.

    3.2%

  5. Exoplanet

    Planet outside of the Solar System.

    1.8%

  6. Cosmic shoreline

    Planetary atmosphere boundary.

    1.1%