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# What is the maximum distance between the Earth and Mercury in kilometers?

The maximum distance between the Sun and Mercury is 7.0 × 10 7 7.0 × 10 7 km while the maximum distance between the Sun and the Earth is 1.5 × 10 8 1.5 × 10 8 km.

### 2 Answers by Expert Tutors

David W. | Experienced ProfExperienced Prof
4.4 4.4 (47 lesson ratings) (47)
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Mercury is closer to the Sun than the Earth; its orbit is elliptical;
maximum distance from the Sun = 7*107km

Earth also has an elliptical orbit;
maximum distance from the Sun = 1.5*1011 km

The "maximum distance between the Earth and Mercury" is"
)max distance from Earth and Sun) + (diameter of Sun) + (maximum distance from Sun to Mercury)

Note: this assumes that distance from the Sun in measured from the centers.

So.   1.5*1011 + 7*107          [leave out diameter of um]
150,000,000,000 + 70.000.000 = 150.070.000,000   =    1.507*1011 km

This also assumes that the apogee or the Earth and of Mercury can occur opposite sides of the Sun.
Andy C. | Math/Physics TutorMath/Physics Tutor
5.0 5.0 (10 lesson ratings) (10)
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Mercury between Earth and Sun.

1.5 x 10^8 km  -  7.0 x 10^7 km

10^7 (   1.5 * 10 - 7.0) <--- factors out 10^7

10^7 ( 15 - 7) =

8 x 10^7

Alternatively, you can do 150000000 - 70000000 = 80000000