The Earth is our home, and it is the only place in the universe where we can be certain that life exists. Earth formed from a swirling cloud of gas and dust 4.5 billion years ago, giving rise to our entire solar system, including our star, the sun. According to the best scientific theories, this gas and dust collapsed into a disc, with different parts of the disc coalescing into each of our solar system's planets.According to Universe Today, our planet is located in a small corner of the Milky Way galaxy, 25,000 light-years from the galactic centre and 25,000 light-years from the rim. Our solar system is located on the Orion-Cygnus arm, which is a minor branch of the Sagittarius arm, one of the galaxy's two major spiral arms. The Earth is the largest rocky planet in the solar system, with a circumference of 24,901 miles (40,075 kilometres). Our planet orbits the sun at a distance of 93 million miles (150,000 km), providing the ideal temperature for persistent liquid water on the surface, making it the only known body to do so.
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