THE SMALLER PLANETS.
We Have often read about the larger planets and attempted to visualise conditions upon them, and it is interesting to try and learn something about the smaller ones.
To maintain life a planet must have certain conditions of atmosphere, and to hold its heat and air, and be neither too near nor too far from the sun. Vegotation, which changes earlion dioxide to oxygen, ie imperative. A small planet which was not big enough to i.«.u its atmosphere by its force of gravity must soon become unfit for life of any kind, because there could be neither water nor oxygen upon it. The conception is that a planet, to hold life, must be of a certain eize, big enough to hold its atmosphere, and yet not too big to prevent the forces of Nature outside it from removing the gases which are injurious to life. ,
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Auckland Star, Volume LXVIII, Issue 7, 9 January 1937, Page 3 (Supplement)
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148THE SMALLER PLANETS. Auckland Star, Volume LXVIII, Issue 7, 9 January 1937, Page 3 (Supplement)
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