by J. G. Porter , Ph.D., F.R.A.S.
This month Dr. Porter talks about Mercury and Venus and some other inferior planets.
The diagram shows the night sky in October,, looking east at 10.0 p.m.
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by J. G. Porter , Ph.D., F.R.A.S.
This month Dr. Porter talks about Mercury and Venus and some other inferior planets.
The diagram shows the night sky in October,, looking east at 10.0 p.m.