DeviantMan -> RE: Food for Thought (5/31/2011 10:02:06 AM)
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heartcream dear, one of the basic concepts of all physics, is gravitational pull, based on mass and density.The more an object has of both, the more it's gravitational pull shall be. A comet able to create such a massive effect on Earth, or any planet for that matter, would need to be at least the size of Mars, to begin with. Given the distance it will be from Earth, within it's closest proximity trajectory point, even if it was as big as Mars, it would still be too small, and too far, to cause that level of effect. Additionally, comets are never as dense as planets. Their spectacular tail, is a trail of dissolved, molten materials that were part of the comet. As the comet reaches closer to stars, the heat and gravitational pull, cause these bits to melt, burn and detach from the comet. What does that mean for us Earthlings? We are fortunate enough to be close to the sun, which means that most comets will accelerate, and start burning, before they get too close. I could go on for a really long monologue as to why the science within the source text lacks value and credibility, but I'm going to stop it here
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