by J. G. Porter , Ph.D., F.R.A.S.
This month Dr. Porter talks about Man and also about tektites and other meteorites.
The diagram illustrates the night sky looking east at midnight showing the apparent path of Mars to the end of the year.
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by J. G. Porter , Ph.D., F.R.A.S.
This month Dr. Porter talks about Man and also about tektites and other meteorites.
The diagram illustrates the night sky looking east at midnight showing the apparent path of Mars to the end of the year.