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Message Subject
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Comet ISON for DUMMIES - Or - WHAT MAY HAPPEN NEXT? - Low TECH - EASY Explanation!! - LATEST - NASA Dark AND so are we!!
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Poster Handle
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Setheory |
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Post Content
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At least the title of this thread is somewhat accurate.
The first part of our opening post isn't so bad, but then you start to display an assortment of false premises regarding what NASA has said and more importantly what the density of a comets tail is. The coma/tail of a comet accounts for a small fraction of its mass and thus you cannot use the diameter of said coma/tail to determine its gravitational effects. I applaud you for trying to learn a little more about comets on your own, but you really need to gain a little bit better understanding regarding gravity, mass and density and such.
Quoting: Setheory 22372062 Now it's interesting you should say this. Maybe you could explain just what it is that gives say, Saturn its gravity if it's formed mainly just from gases, which in themselves have little or no mass?  That is where "density" comes into play. Consider this: If we observe Comet JoeSmith out around Jupiter and we measure the coma to be around 50,000 km. Then 6 months later it is measured to be 200,000 km in size. Is its mass 4 times greater?Answer: No
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