April 22, 2014

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How far are the planets from the Sun?

Artist’s impression of the planets in our solar system, along with the Sun (at bottom). Credit: NASA
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Artist’s impression of the planets in our solar system, along with the Sun (at bottom). Credit: NASA

The eight planets in our solar system each occupy their own orbits around the Sun. They orbit the star in ellipses, which means their distance to the sun varies depending on where they are in their orbits. When they get closest to the Sun, it's called perihelion, and when it's farthest away, it's called aphelion.

So to talk about how far the planets are from the is a difficult question, not only because their distances constantly change, but also because the spans are so immense—making it hard for a human to grasp. For this reason, astronomers often use a term called , representing the from the Earth to the Sun.

The table below (first created by Universe Today founder Fraser Cain in 2008) shows all the planets and their distance to the Sun, as well as how close these get to Earth.

Mercury

Venus

Earth

Mars

From the Solar Dynamics Observatory: Planet Venus transiting the Sun in the 304 Anstrom wavelength at approx. 90,000 degrees Fahrenheit in July 2012. Credit: NASA/SDO
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From the Solar Dynamics Observatory: Planet Venus transiting the Sun in the 304 Anstrom wavelength at approx. 90,000 degrees Fahrenheit in July 2012. Credit: NASA/SDO

Jupiter

Saturn

Uranus

The “pale blue dot” of Earth as seen from Cassini on July 19, 2013. Credit: NASA / JPL-Caltech / Space Science Institute
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The “pale blue dot” of Earth as seen from Cassini on July 19, 2013. Credit: NASA / JPL-Caltech / Space Science Institute

Neptune

As a special bonus, we'll include Pluto too, even though Pluto is not a planet anymore.

Artist’s impression of New Horizons’ encounter with Pluto and Charon. Credit: NASA/Thierry Lombry
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Artist’s impression of New Horizons’ encounter with Pluto and Charon. Credit: NASA/Thierry Lombry

Pluto

More information: Online resources demonstrating the scale of the Solar System:

If The Moon Were Only A Pixel (Josh Worth Art & Design)Scale Model Of Our Solar System (University of Manitoba)Build A Solar System (Exploratorium)Scale Solar System (Josh Wetenkamp)

Many cities and countries have also installed scale models of the Solar System, such as:

Voyage Scale Solar System (Washington, D.C.)Sagan Planet Walk (Ithaca, N.Y.)Maine Solar System ModelSweden Solar SystemPlanet Walk (Munich, Germany)The Solar System (Brittany, France; website in French only)Solar System Drive (Australia)

Provided by Universe Today

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