10,000,000
miles
6.7 x 108 km. That is 670,000,000 km
The planet Mercury. At a distance of 28½ to 43 million kilometers from the Sun, it is only about a third as far from the Sun as Earth and receives commensurately higher solar radiation. At its closest to the Sun, Mercury receives heat and light ten times more intense that on the Earth, that would be about 13 kW per square metre. Seem from the back of Mercury, the part that faces away fom the Sun, the Earth would look like a bright planet with a dimmer object, the Moon, up to about 0.15º from it at maximum.
The average distance of Neptune from the sun is 2,795,084,800 miles or 4,498,252,900 kilometers.
Not that far I walked it once. Call Old Mate if needed. My calculations are 3+4=7
about 230 miles
~2,900 km
Halifax
154 Miles
600 miles
78 miles
It draws heat away fom the object that is is being used on.
dryer sheets