0.387 is the average distance from the Sun to Mercury in AU. Note: AU=astronomical unit
Mercury averages about 0.35 AU from the Sun, and Saturn is about 9.5AU from the Sun. So depending on where each planet is in its orbit (or more specifically, where Mercury is in its orbit) Saturn will be anywhere from 9.2 AU to 9.8 AU from Mercury.
Mercury--Sun= AU Venus--Sun= AU Earth--Sun=1 AU Mars--Sun= AU Jupiter--Sun= AU Saturn--Sun= AU Uranus--Sun= AU Neptune--Sun= AU Pluto--Sun= AU
Mercury's Astronomical units is .39 rounded off or if you want to be semi precise it would be .3870320856
At its furthest (aphelion) 0.467 AU and at its nearest (perihelion) 0.307 AU.
They are less than 1 AU from the sun.
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Mercury is closer to the Sun than the Earth.
The furthest mercury gets from the Sun is 69,816,900 km (0.466 697 AU)
Mercury averages around this distance from the sun.
Mars is the closest. Mars orbital period is 687 days. Earth, as we all know, is 365 days. The next planet out, Jupiter, revolves around the Sun in 12 years. Saturn for information takes almost 30 years. Saturn
Aphelion: 0.466697 AUPerihelion: 0.307499 AUMean: 0.387098 AU