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What's the Order of the Planets in the Solar System?


Over the past 60 years, humans have begun to explore our solar system in earnest. From the first launches in the late 1950s until today, we've sent probes, orbiters, landers, and even rovers (like NASA's Perseverance Rover that touched down on Mars in February 2021) to every planet in our solar system. But can you name all eight of those planets? (Yes, there's only eight – not nine. Pluto got "demoted" in 2006.) And can you put them in the correct order?

 

 

The Order of the Planets by Distance

 

The most common way to order the planets is by their distance from the sun. Using this method, the planets are listed in the following order:

 

  • Mercury - 0.39 AU from the sun

  • Venus - 0.72 AU

  • Earth - 1.00 AU

  • Mars - 1.52 AU

  • Jupiter - 5.20 AU

  • Saturn - 9.54 AU

  • Uranus - 19.20 AU

  • Neptune - 30.06 AU

 

 

AU stands for astronomical units – it's the equivalent to the average distance from Earth to the sun (which is why Earth is 1 AU from the sun). It's a common way astronomers measure distances in the solar system that accounts for the large scale of these distances. To put it another way, Mercury, which is closest, is 35.98 million miles from the sun, while Neptune, the farthest, is 2.79 billion miles from the sun. Earth is 92.96 million miles from the sun.

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