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Understanding Distances in the Solar System Using Astronomical Units

In the vastness of the solar system, distances are often measured in astronomical units (AU) rather than kilometers or miles. For reference, the distance from the Sun to Earth is approximately 93 million miles, which equals 1 AU. Other notable distances include the Sun to Mars at about 1.52 AU and the Sun to Mercury at approximately 0.39 AU. The average distance from the Sun to Pluto is around 39.5 AU. This unit of measurement simplifies the understanding of the vast distances between celestial bodies.

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Understanding Distances in the Solar System Using Astronomical Units

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  1. Measuring Distances in the Solar System • Instead of using km or miles, the astronomical unit is used to measure distances in the solar system.

  2. Sun to Earth = 93,000,000 miles = 1 astronomical unit = 1 au Sun to Mars = 1.52 au Sun to Mercury = 0.39 au

  3. Average distance from the Sun to Pluto is 39.5 au

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