Good lookin' out (jargon ;'). Even in the mid-1970s, the idea of the so-called greenhouse effect on Venus (which was suggested long before Sagan, when the cloud top temps were first measured using radar observations, before the space age) was rejected because the Venusian atmosphere is opaque to the sun's rays, such that the surface glow detected by the Venera probes is not due to solar rays -- they don't reach the surface.
My favorite title from those two KRONOS special issues is C.J. Ransom's "Sagan's Appendices: A Quick Appendectomy".
My favorite title from those two KRONOS special issues is C.J. Ransom's "Sagan's Appendices: A Quick Appendectomy".
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I would love to read that, do I have to join KRONOS - or can you please provide a link?