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Kiloparsec

A kiloparsec (kpc) is a unit of distance used in astronomy equal to 1,000 parsecs, or about 3,260 light-years. It is commonly used to measure distances within and between galaxies. For example, the Milky Way galaxy is about 30 kiloparsecs in diameter. Kiloparsecs help astronomers describe large-scale structures in space more conveniently than using light-years alone. The symbol for kiloparsec is "kpc". It’s an important unit for understanding the size and scale of galaxies and their components.

Earth’s Distance from the Sun

The average distance between the Earth and the Sun is known as an Astronomical Unit (AU).

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  It is approximately 149.6 million kilometers (about 93 million miles).

  
  
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  This distance varies slightly throughout the year because Earth’s orbit is elliptical—closest at perihelion (~147.1 million km) and farthest at aphelion (~152.1 million km).

  
  
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  The astronomical unit is a fundamental standard for measuring distances within our solar system.

  
  

Key facts:

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  Average distance ≈ 149.6 million km (1 AU)

  
  
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  Varies due to elliptical orbit

  
  
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  Basis for measuring planetary distances

  
  

Understanding Earth’s distance from the Sun is essential for studying seasons, climate, and orbital mechanics.