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  1. Mercury Facts - Science@NASA

    Apr 25, 2025 · Mercury is the smallest planet in our solar system and nearest to the Sun. It's only slightly larger than Earth's Moon. From the surface of Mercury, the Sun would appear more …

  2. Basic Information about Mercury - US EPA

    Nov 21, 2025 · Elemental or metallic mercury is a shiny, silver-white metal, historically referred to as quicksilver, and is liquid at room temperature. It is used in older thermometers, fluorescent …

  3. Mercury | Facts, Color, Size, & Symbol | Britannica

    Nov 29, 2025 · Mercury, the innermost planet of the solar system and the eighth in size and mass. Its closeness to the Sun and its smallness make it the most elusive of the planets visible to the …

  4. Mercury (planet) - Wikipedia

    Mercury is the first planet from the Sun and the smallest in the Solar System. It is a rocky planet with a trace atmosphere and a surface gravity slightly higher than that of Mars.

  5. Mercury Facts | Mercury Size | Mercury Planet Color | How Big Is ...

    Dec 3, 2025 · Mercury is the smallest planet in the Solar System in both mass and diameter. It’s 18 times less massive than the Earth, and its diameter barely reaches two-fifths of the Earth’s …

  6. Mercury Planet Facts - Science Notes and Projects

    Mar 26, 2024 · Mercury is the closest planet to the Sun and the smallest planet in the Solar System. It gets its name for the Roman god Mercury, who was the swift messenger of the gods.

  7. Mercury Planet: Definition, Density, Color, Facts, Discovery

    Mar 27, 2025 · Mercury is the smallest planet in the solar system and the closest to the Sun. Mercury exhibits a grayish color, high density, and extreme temperature fluctuations between …

  8. Mercury 101 - Education

    Dec 3, 2024 · The planet Mercury is named after the messenger of the Roman gods because of its fleeting nature across the sky. Find out the reason behind its incredible speed, if it is indeed …

  9. Mercury facts | BBC Sky at Night Magazine

    Jun 26, 2025 · Mercury, the closest planet to the Sun and the smallest planet in the Solar System, is a desolate world. The planet has almost no atmosphere, meaning there’s no protection from …

  10. Mercury planet - Canadian Space Agency

    Mercury is the closest planet to the Sun, which likely influenced its composition and formation. The planet has a surprisingly large iron core, which may have formed because the early Sun …