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Updated: May 3, 2025
Now, granted that the solar system was once a nebula, on which I think every one will agree the same forces that changed it into a system of sun and planets must be at work on fifty-one M. Canum venaticorum, Andromeda, and ninety- nine M. Virginis, and must inevitably change them to suns, each with doubtless a system of planets.
The greatest centre became the sun, and the others, large and small, the planets, which as a result of the spiral motion of the whole, such as is now going on before our eyes in the great nebulae of fifty- one M. Canuin venaticorum, and many others began to revolve about the greatest central body of gas.
Roberts has been kind enough to send me copies of the photographs in question and sundry others illustrative of stellar evolution. Those representing the Great Nebulæ in Andromeda and Canum Venaticorum as well as 81 Messier are at once impressive and instructive illustrating as they do the genesis of nebulous rings round a central mass.
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