Venus planetary tables

Figure 3 A cartoon illustrating Venus interior structure based on current bulk composition models (see Table 9) (after Lodders and Fegley, 1998) (reproduced by permission of Oxford University Press from the Planetary Scientist s Companion 1998, p. 118).

There are a number of reasons for believing that the Earth originally had a more C02-rich atmosphere than it does today. At a very basic level the simple comparison with its planetary neighbors Mars and Venus shows that they both now have atmospheres with more than 95% C02 (Table 5.4). Since it is likely that, in the absence of living organisms and an active tectonic cycle, these planets have retained... 

Sources Adapted from Bruce Fegley, Jr., "Venus,"Table 6, in A. M. Davis, ed.. Treatise on Geochemistry. New York Elsevier, 2004, and David R. Williams, Preliminary Mars Pathfinder APXS Results," http //nssdc.gsfc.nasa.gov/ planetary/marspath/apxs table1. html. For more detailed information on terrestrial data, see Taylor, S. R.( and S. M. McLennan, 1985 The Continental Crust Its Composition and Evolution. Blackwell Scientific Publications, 1985. 

Table 1 compares physical parameters of the planetary atmospheres discussed below. We separate these into two groups (1) the terrestrial planets (Venus, Earth, and Mars), and (2) the gas giant planets (Jupiter, Saturn, Uranus, and Neptune). Properties for the terrestrial planets are given at the observed surface conditions. Properties for the gas giant planets, which do not have observable solid surfaces, are given at the 1 bar atmospheric level. 

The symbols that are used to depict each element in the periodic table ako have a rich and interesting story. In alchemical times, the symbok for the elements often coincided with those of the planets from which they were named or with which they were associated (figure 1.3). The element mercury, for example, shared the same symbol as that of Mercury, the innermost planetary body. Copper was associated with the planet Venus, and both the element and the planet shared the same symbol. 

Hinrichs s wide range of interests extended to astronomy. Like many authors before him, as far back as Plato, Hinrichs noticed some numerical regularities regarding the sizes of the planetary orbits. In an article published in 1864, Hinrichs showed a table (table 3.7) that he proceeded to interpret. Hinrichs expressed the differences in these distances by the formula 2 X w, in which n is the difference in the distances of Venus and Mercury from the sun, or 20 units. Depending on the value of X, the formula therefore gives the following distances ... 

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