The average mean distance of Earth from the sun is . a. 153.6 x 10^3 km
b. 120.2 x 10^2 km
c. 149.6 x 10^6 km
d. 102.4 x 10^5 km

The mean distance of Earth from the Sun is 149.6 × 10^6 km and the mean distance of Mercury from the Sun is 57.9 × 10^6 km.

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the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19