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<blockquote data-quote="Martian" data-source="post: 103329" data-attributes="member: 6511"><p>If you want to know earth's position, there are at least a couple of ways you could do it. The simplest way would be to use orbital equations and the fact that we know the orbital period, eccentricity, etc. This would depend on knowing the date, however.</p><p></p><p>Another method would be to use a camera (preferably infrared) to map the night sky, using an image recognition algorithm to match what's in the sky at a given time & location on earth with known stellar charts. Since we see different stars in the night sky at different times of the year, and since the night sky changes gradually over the eons, this could provide an indication of where & when you're located.</p><p></p><p>However, one must remember that the sun is also moving. If you're thinking of hopping into the future/past and expecting the earth to be directly underneath your feet on the same day of another year, all I can say is send a robotic probe first to make sure! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite44" alt=":p" title="Stick out tongue :p" loading="lazy" data-shortname=":p" /></p></blockquote><p></p>
[QUOTE="Martian, post: 103329, member: 6511"] If you want to know earth's position, there are at least a couple of ways you could do it. The simplest way would be to use orbital equations and the fact that we know the orbital period, eccentricity, etc. This would depend on knowing the date, however. Another method would be to use a camera (preferably infrared) to map the night sky, using an image recognition algorithm to match what's in the sky at a given time & location on earth with known stellar charts. Since we see different stars in the night sky at different times of the year, and since the night sky changes gradually over the eons, this could provide an indication of where & when you're located. However, one must remember that the sun is also moving. If you're thinking of hopping into the future/past and expecting the earth to be directly underneath your feet on the same day of another year, all I can say is send a robotic probe first to make sure! :P [/QUOTE]
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