Moreover, it is not impossible, nor do we think it at all improbable, that through the course of time astronomers may discover that Phobos is a captured asteroid--perhaps Deimos also--gradually working its way into final annexation. And who can tell how many of these erratic bodies Jupiter and Mars may have captured already? In the dark as it were, for they may have been too small to be noticed when they were being run in. Neither of these two worthies has ever been very much celebrated in song or history for respect for his neighbour's property. Jupiter is credited with sorting out the asteroids and arranging them in bands, and perhaps he has been human enough to exact a commission for his labour; and it might be more in his line, and certainly much more easy for Mars, to take forcible possession of as many of them as came within his reach.
PAGE 126 Analysis continued. No contingent of heat could be imparted to any planet by the parent nebula. 127 Only one degree of heat added to the nebula from the beginning till it had contracted to the density of 1/274th of an atmosphere. 127 Increase in temperature from 0° to possible average of 274° when condensed to 4,150,000 miles in diameter. 128 Time when the sun could begin to act as sustainer of life and light anywhere. Temperature of space. 129 The ether devised as carrier of light, heat, etc. etc. What effect it might have on the nebula. 130 First measure of its density, as far as we know. 133 The estimate _too_ high. May be many times less. 134 Return to the solar nebula at 63,232,000 miles in diameter. 134 Plausible reason for the position of Neptune not conforming to Bode's Law. The ring being very wide had separated into two rings. 135 Bode's law reversed. Ideas suggested by it. 137 Rates of acceleration of revolution from one planet to another. 138 Little possibility of there being a planet in the position assigned to Vulcan. 138 Densities of planets compared. Seem to point to differences in the mass of matter abandoned by the nebula at different periods. 139 Giving rise to the continuous sheet of matter separating into different masses. Probably the rings had to arrive at a certain stage of density before contracting circumferentially. 140 Possible average temperature of the sun at the present day. Central heat probably very much greater. 140 Churning of matter going on in the interior of the sun, caused by unequal rotation between the equator and the poles.