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Joachim Herrmann

dtv-Atlas zur Astronomie, 1973

Page 67 Proportions of the moon

With a diameter of 3476.0 km the moon has more than a quarter or exactly 27% of the size of the earth. Its surface contains 37.960 million km^{2} or 7.4% of the surface of the earth and its volume is 21 990 million km^{3} or 2.0% of the earth volume. The mass of the moon amounts to 7,350 . 10^{25} g or 1.2% or 1/81.3 of the earth mass.

Finally the average density of the moon may still be mentioned with 3.342 g/cm^{3} or 61% of earth density. The gravity acceleration at the surface of the moon is 162.0 cm/s^{2} or 16.6% of the earthly value. A body, which weighs 100 kg on the earth, therefore has only a weight of 16.6 kg. The escape velocity on the moon is about 2.37 km/s.

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