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Solving solar system quandaries is simple: Just flip-flop the position of Uranus and Neptune
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Everything I need to know I learned through Googling. |
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The wandering (eh) of planets may have caused the late heavy bombardment (see this; the site has a nice animation of how the orbits of giant planets may have evolved).
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Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool. -- Richard Feynman |
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Best regards, Dan |
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I wish they'd switch back. Uranus resolves to a disk in my scope but Neptune is a much prettier shade of blue. Unfortunately it's just a dot or at least a very small disk.
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The 14 February issue of Science News had a very nice article on the latest modeling of the late heavy bombardment, including the work linked to in post # 2.
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At night the stars put on a show for free (Carole King) One Earth, One Sky - IYA 2009 All moderation in purple |
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Thanks Swift, Kullat (and ToSeek)...very informative and thought provoking material.
Swift,,,unfortunately, can't load your link, right now...could be my end of it...i'll try again later....thanks anyway...
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clear skies If you want to make an apple pie from scratch, you must first create the universe. CARL SAGAN Mak: Pass the pepperoni please. Fazor: "Hail, Bautainia! We pledge our hearts to thee! Science and woo, some babbling too, and astron-oh-meee!" slang: And it made ash out of yew and tree. |
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The first paragraph seems to imply that water and other compounds essential to life were delivered to the inner planets after their formation from the outer solar system, presumably during the LHB, yet later in the article they say the Earth was already wet and suitable for life soon after its formation.
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Four billion years ago is an awfully long time to speculate about. Whereas, Velikovsky thought Saturn was a captured Brown Dwarf with Venus as one of its planets. He also thought that Uranus was turned on its side by a close passage of Saturn on its way in... His opinion is rather less than scientifically proven, but intersting nevertheless. By the way, he also predicted most of the moons of Jupiter and Saturn would be composed of water ice. As I mentioned earlier, four billion years is an awfully long time to speculate about and since anything can happen and usually does happen, why not speculate? By the way, I am NOT a proponent of Velikovsky's ideas but bring up the point, just because.
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