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Discussion and Debate
Discussion and Debate
Physical & Life Sciences
Non-Mainstream and Controversial Science
the myth of flat earth debunked again
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<blockquote data-quote="Gene2memE" data-source="post: 77636877" data-attributes="member: 341130"><p>Earth is part of the solar system....</p><p></p><p>While "every other solar system and star is moving at different speeds", they are mostly moving in broadly the same direction and their positions relative to each other are only changing in a very minor way. They're also very, very far away from us, so their relative change in position is very small from our frame of reference.</p><p></p><p>Picture cars on a highway. If everyone is doing roughly the speed limit and we're all going the same way, then there's very little change in our relative positions. </p><p></p><p></p><p></p><p>Polaris has moved. Just a very, very small amount.</p><p></p><p>Polaris has a relative motion in the sky of about 46 arcseconds per 1000 years. That's tiny.</p><p></p><p>Expressed another way, to an observer on earth Polaris moves across the sky by about 0.0000012777778 of a degree every year. So for Polaris to move a whole 1 degree across the sky, it would take about 782,000 years.</p><p></p><p>If ancient people built something 10,000 years ago to line up with Polaris, then it's still going to be lined up with Polaris. Because the star will have only traversed about 0.013th of a degree through the sky. I'm not sure about you, but I don't think that neolithic construction methods got down to hundredths of a degree of accuracy.</p><p></p><p></p><p></p><p>No. Andromeda and the Milky Way are actually moving towards each. They're coming towards each other at a rate of about 670,000 mph, or 5.8 billion miles per year. The two galaxies are estimated to start to merge in about 4.5 billion years.</p><p></p><p>Andromeda's relative motion in the sky is also very slow - about 152 arcseconds per 1000 years. So, it's moving about 1 degree every 236,000 years</p></blockquote><p></p>
[QUOTE="Gene2memE, post: 77636877, member: 341130"] Earth is part of the solar system.... While "every other solar system and star is moving at different speeds", they are mostly moving in broadly the same direction and their positions relative to each other are only changing in a very minor way. They're also very, very far away from us, so their relative change in position is very small from our frame of reference. Picture cars on a highway. If everyone is doing roughly the speed limit and we're all going the same way, then there's very little change in our relative positions. Polaris has moved. Just a very, very small amount. Polaris has a relative motion in the sky of about 46 arcseconds per 1000 years. That's tiny. Expressed another way, to an observer on earth Polaris moves across the sky by about 0.0000012777778 of a degree every year. So for Polaris to move a whole 1 degree across the sky, it would take about 782,000 years. If ancient people built something 10,000 years ago to line up with Polaris, then it's still going to be lined up with Polaris. Because the star will have only traversed about 0.013th of a degree through the sky. I'm not sure about you, but I don't think that neolithic construction methods got down to hundredths of a degree of accuracy. No. Andromeda and the Milky Way are actually moving towards each. They're coming towards each other at a rate of about 670,000 mph, or 5.8 billion miles per year. The two galaxies are estimated to start to merge in about 4.5 billion years. Andromeda's relative motion in the sky is also very slow - about 152 arcseconds per 1000 years. So, it's moving about 1 degree every 236,000 years [/QUOTE]
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the myth of flat earth debunked again
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