A Comparison of
Venus and Earth

We close the discussion of Venus by noting that despite the original prejudices that Earth and Venus were sister planets, there are many differences between them. Among them we may list the following features of Venus that differ substantially from the corresponding situation for the Earth.

  1. The slow rotational period, and retrograde rotation.

  2. The single-plate surface.

  3. The lack of a satellite (= a moon).

  4. The extremely weak magnetic field.

  5. The lack of water.

  6. The high surface temperature and dense atmosphere.
These and other differences, only some of which we understand well, suggest that we still have a lot to learn about our "sister planet".