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  1. 8.350022 minutes. While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface. Just slightly larger than nearby Venus, Earth is the biggest of the four planets closest to the Sun, all of which are made of rock and metal. Earth is the only planet in the solar system ...

  2. And it’s no surprise. 70% of our planet is covered with oceans. The remaining 30% is the solid ground, rising above sea level. -Earth is mostly iron, oxygen and silicon. If you could separate the Earth out into piles of material, you’d get 32.1 % iron, 30.1% oxygen, 15.1% silicon, and 13.9% magnesium.

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    • Earth is the third planet from the sun in our solar system. Its name comes from the the old English and Germanic words meaning ‘the ground’.
    • Our amazing planet has been around for quite some time. By researching our planet’s rocks, scientists have calculated the Earth to be around 4.5 billion years old!
    • Like all the planets, Earth orbits (travels around) around the sun. And it does so at some serious speed –– around 30 kilometres per second, in fact!
    • Have you ever wondered why we have different seasons? We’ll tell you –– it’s because the Earth is tilted 23.4 degrees on its ‘axis’, an imaginary line straight through the middle of the planet form the North Pole to the South Pole.
    • We're the third rock from the sun. Our home, Earth, is the third planet from the sun and the only world known to support an atmosphere with free oxygen, oceans of liquid water on the surface and life.
    • Earth is squashed. Earth is not a perfect sphere. According to the National Oceanic and Atmospheric Administration (NOAA), as Earth spins, gravity points toward the center of our planet (assuming for explanation's sake that Earth is a perfect sphere), and a centrifugal force pushes outward.
    • The planet has a waistline. Gravity pushes extra masses of water and earth into a bulge, or "spare tire" around our planet. At the equator, the circumference of the globe is 24,901 miles (40,075 kilometers), according to Space.com.
    • Earth is on the move. You may feel like you're standing still, but you're constantly moving — fast. Depending on where you are on the globe, you could be spinning with the planet at just over 1,000 miles per hour, according to Space.com.
    • The Big Bang created all matter in the universe. Ready? Start your stopwatch. In just a fraction of a second, all matter in the universe was created from the Big Bang.
    • The universe is expanding into the unknown. The universe is immeasurable in size. And for all we know, the universe is expanding indefinitely into limitless bounds.
    • Welcome to the Milky Way Galaxy. Earth belongs to the Milky Way galaxy. It’s home to over 200 billion stars and ours is the Sun. A supermassive black hole is at the galactic center.
    • Gravity sculpts solar systems. What brings order to Earth is gravity. Gravity is always at work. Not only did gravity sculpt our universe, but it’s also why rocks fall downhill.
  4. With a radius of 3,959 miles, Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface. Earth is also unique in terms of ...

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