Quote:
Originally Posted by freebeard
How can that be, when they are both spherical?
The Moon is constantly sucking on the Earth's oceans. Probably on the atmosphere as well.
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1) It's a 'size' thing.
2) Volume = 4/3 pi radius - cubed
3) Area = 4 pi radius-squared
4) Earth is 3,958.8-miles mean radius vs 2,106-miles for Mars
5) Heat loss is always a function of delta- temperature, a heat transfer coefficient, and a specific surface area unit of measure.
6) Plugging the different radii into the equations, the ratios of contained planetary mass volume, compared to respective surface areas, shows that Mars was at a significant thermal mass/ exposed surface area liability compared to Earth.
7) Space 'outside' the two planets was identical 'sink' temperature.
8) Heat transfer coefficients are identical ( same rock ).
9) Internal heat source and a greenhouse atmosphere to hold heat in was completely different between Earth and Mars.
10 Venus has too much of a good thing. It's pure greenhouse gas atmosphere won't allow any of its heat to radiate to space, keeping it at a constant 867- F, day and night, with 200-mph winds, day and night.
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As to Mars 'sucking' on Earth's oceans, I've never heard of such a thing.