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I have a lifetime interest in bird-flight aerodynamics. I have recently become interested in the flight of Pterosaurs since, whenever I see or read about them, their capabilities do not reach credibility. Quetzelcoatlus Northropii, for example, the largest ever Pterosaur with a wingspan of over 30feet has been described by the Palaeontologists as being the size of a giraffe but with the weight of a Shetland Pony (any heavier and it couldn't match the current laws of aerodynamics which apply in the modern atmosphere!). But it could fly in theory, even at that weight, if the medium through which it was flying was much thicker/denser than that of today. The so-called 'thick atmosphere' hypothesis. Who knows what the thickness/density of the Mesozoic/Cretaceous atmosphere actually was?


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awarded  Autobiographer
Jan
28
comment Could the earth's atmosphere have been partially stripped by a passing rogue planet?
Why would the rogue planet be 'lurking around the solar system'? Surely it would be hammering past, rip off Earth's atmosphere and disappear into deep space again. Remember that these planets are likely to be gas giants much larger than Jupiter and if they were travelling fast enough, they would not stay long within the clutches of the Sun's gravitational pull.
Jan
11
awarded  Editor
Jan
11
awarded  Student
Jan
11
revised Could the earth's atmosphere have been partially stripped by a passing rogue planet?
Grammar/expression
Jan
11
asked Could the earth's atmosphere have been partially stripped by a passing rogue planet?