What is the distance between the Earth and the Sun in km?
The average distance between the Earth and the Sun is 149,590,787 km or 92,951,640 mi. This distance is called an Astronomical Unit (AU). The orbit of the Earth deviates a bit from a circle, so the distance between the Earth and the Sun isn’t always the same. The Earth is closest to the Sun (in the perihelion of the Earth’s orbit) around 4 January, when it is winter in the northern hemisphere of the Earth and summer in the southern hemisphere, and is furthest from the Sun (in the aphelion of the Earth’s orbit) around 4 July, when it is summer in the north and winter in the south. The difference between the distances on 4 January and 4 July is about 3 percent, which corresponds to about 5 million km or 3 million mi.