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  1. Earth - Wikipedia

    Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface …

  2. Earth | Definition, Size, Composition, Temperature, Mass, & Facts ...

    2 days ago · Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only …

  3. Facts About Earth - Science@NASA

    Aug 27, 2025 · Earth – our home planet – is the third planet from the Sun, and the fifth largest planet. It's the only place we know of inhabited by living things. While Earth is only the fifth largest planet in the …

  4. What is Earth? A Journey Through the Living Planet

    May 18, 2025 · Earth is the third planet from the Sun, orbiting at just the right distance where liquid water can exist—a region astronomers call the “habitable zone.” If Earth were slightly closer, its oceans …

  5. Earth - National Geographic Society

    Dec 5, 2024 · Earth is the planet we live on, one of eight planets in our solar system and the only known place in the universe to support life. Earth is the third planet from the sun, after Mercury and Venus, …

  6. What is Earth? - The Institute for Environmental Research and Education

    Jun 17, 2025 · Earth, the third planet from the Sun, is a swirling blue and white sphere suspended in the vast darkness of space. Its beauty, captured in countless photographs, belies the incredibly intricate …

  7. Planet Earth facts and information | National Geographic

    Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life.

  8. Earth Planet: Definition, Size, Distance, Facts, Surface

    Mar 27, 2025 · Earth is the third planet from the Sun and the only known celestial body to support life. Earth’s size, distance from the Sun, and surface properties create a unique environment that enables …

  9. Earth - New World Encyclopedia

    Earth is the third planet in the solar system in terms of distance from the Sun, and the fifth in order of size. It is the largest and densest of the solar system's terrestrial planets. Scientists estimate that the …

  10. What is Earth? | AMNH

    From slow creeping continents to ground-splitting quakes, the Earth is constantly changing. Take a peek at our planet's layers, learn what secrets rocks reveal, and gain a long view of history.