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<blockquote data-quote="Staffan" data-source="post: 6997553" data-attributes="member: 907">That's more a matter of buoyancy than gravity, but point taken.That bit was in response to the OP's: &quot;I presume that the our own real-world ancients worked out that it wasn't through some observational means that distinguishes the earth going around the Sun from the other wary around. What was that?&quot;Basically, the issue of whether the Sun revolves around the Earth or vice versa is, in itself, rather pointless (and technically, in the real world they're both orbiting a point somewhere in between, though this point lies inside the Sun but not at its center). The thing that made astronomers and then other people switch to the heliocentric world-view was the way other things moved, and that things were much simpler when you looked at them from the heliocentric perspective. There was actually a &quot;compromise&quot; worldview put forward by Tycho Brahe that stated that the Sun and the Moon revolved around the Earth, but all the planets revolved around the Sun.</blockquote>

[QUOTE="Staffan, post: 6997553, member: 907"] That's more a matter of buoyancy than gravity, but point taken. That bit was in response to the OP's: "I presume that the our own real-world ancients worked out that it wasn't through some observational means that distinguishes the earth going around the Sun from the other wary around. What was that?" Basically, the issue of whether the Sun revolves around the Earth or vice versa is, in itself, rather pointless (and technically, in the real world they're both orbiting a point somewhere in between, though this point lies inside the Sun but not at its center). The thing that made astronomers and then other people switch to the heliocentric world-view was the way [B]other[/B] things moved, and that things were much simpler when you looked at them from the heliocentric perspective. There was actually a "compromise" worldview put forward by Tycho Brahe that stated that the Sun and the Moon revolved around the Earth, but all the planets revolved around the Sun. [/QUOTE]

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