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![]() Geopelia wrote: Heliostat: the sun stood still/goes not down 1/2 day?plays havoc with birds ability to nav-grow seasons. Heliostat From Wikipedia, the free encyclopedia Jump to: navigation, search A Heliostat is a device that tracks the movement of the sun. It is typically used to orient a mirror, throughout the day, to reflect sunlight in a consistent direction. When coupled together in sufficient quantities, the reflected sunlight from the heliostats can generate an enormous amount of heat if all are oriented towards the same target. It was originally developed as an instrument for use in surveying, allowing the accurate o wrote in message ups.com... Thanks Brian, (snip) - - Joshua ch. 10 The Sun Stands Still N.I.V. - the fact is? we do not know what happened, - except that it involved divine intervention - - Perhaps you could explain the process whereby a Judean myth becomes a - 'fact'. - - Brian Tozer (snip) Perhaps it was due to some atmospheric condition like that which that causes sundogs. The best known example would be the three suns appearing before the battle of Mortimer's Cross. It has also been suggested as an explanation for some of Ezekiel's vision. Obviously if the sun really stood still it would be because the Earth had stopped rotating! ?????????????????????????????????????????????????? ?????????????????????????????????????????????????? ????? Geopelia Viganella Italy mirror dompost...this week ca. 18/12/2006. environmental resource consent, resource mgmt act.. don.lotto nz. |
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![]() wrote in message ups.com... Geopelia wrote: Heliostat: the sun stood still/goes not down 1/2 day?plays havoc with birds ability to nav-grow seasons. No it wasn't me who wrote that bit! Geopelia Heliostat From Wikipedia, the free encyclopedia Jump to: navigation, search A Heliostat is a device that tracks the movement of the sun. It is typically used to orient a mirror, throughout the day, to reflect sunlight in a consistent direction. When coupled together in sufficient quantities, the reflected sunlight from the heliostats can generate an enormous amount of heat if all are oriented towards the same target. It was originally developed as an instrument for use in surveying, allowing the accurate o wrote in message ups.com... Thanks Brian, (snip) - - Joshua ch. 10 The Sun Stands Still N.I.V. - the fact is? we do not know what happened, - except that it involved divine intervention - - Perhaps you could explain the process whereby a Judean myth becomes a - 'fact'. - - Brian Tozer (snip) Perhaps it was due to some atmospheric condition like that which that causes sundogs. The best known example would be the three suns appearing before the battle of Mortimer's Cross. It has also been suggested as an explanation for some of Ezekiel's vision. Obviously if the sun really stood still it would be because the Earth had stopped rotating! ?????????????????????????????????????????????????? ?????????????????????????????????????????????????? ????? Geopelia Who added the ??? to my post? That's the only way the sun could really stand still as seen from Earth. It is the Earth's rotation that makes the sun appear to move through the sky. The sun wouldn't really be standing still anyway, it is racing around in the galaxy at a fast rate of knots, carrying its planets with it. Viganella Italy mirror dompost...this week ca. 18/12/2006. environmental resource consent, resource mgmt act.. don.lotto nz. |
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![]() Geopelia wrote: don.dise.net.nz wrote in message ups.com... Geopelia wrote: Heliostat: the sun stood still/goes not down 1/2 day?plays havoc with birds ability to nav-grow seasons. No it wasn't me who wrote that bit! Geopelia i accept responsibility, don.lotto. i donot attribute line by line and i snip redundant info. no offense intended. sorry geopelia. apologies. 27.12.06. don. Heliostat i wonder what the translation would be and this subject may appear in the holy bible.. From Wikipedia, the free encyclopedia 2 results for: heliostat View results from: Dictionary | Thesaurus | Encyclopedia | All Reference | the Web Dictionary.com Unabridged (v 1.1) - Cite This Source he·li·o·stat /ˈhiliəˌstæt/ Pronunciation Key - Show Spelled Pronunciation[hee-lee-uh-stat] Pronunciation Key - Show IPA Pronunciation –noun an instrument consisting of a mirror moved by clockwork, for reflecting the sun's rays in a fixed direction. [Origin: 1740–50; NL heliostata. See helio-, -stat] —Related forms he·li·o·stat·ic, adjective Dictionary.com Unabridged (v 1.1) Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006. American Heritage Dictionary - Cite This Source he·li·o·stat (hÄ“'lÄ“-É™-stÄt') Pronunciation Key n. An instrument in which a mirror is automatically moved so that it reflects sunlight in a constant direction. It is used with a pyrheliometer to make continuous measurements of solar radiation. Perhaps it was due to some atmospheric condition like that which that causes sundogs. The best known example would be the three suns appearing before the battle of Mortimer's Cross. perhaps photo in dominionpost photog on thurs i think, pub sat 23.12.06?? very nice. It has also been suggested as an explanation for some of Ezekiel's vision. Obviously if the sun really stood still it would be because the Earth had stopped rotating! ????????????my question marks don..?????????????????????????? Geopelia Who added the ??? to my post? me again don. That's the only way ///the sun could really stand still as seen from Earth. my /// don.. It is the Earth's rotation that makes the sun appear/// to move through the sky. The sun wouldn't really be standing still anyway, it is racing around in the galaxy at a fast rate of knots, carrying its planets with it. it is all done with mirrors, i do not understand magician speak!! Viganella Italy mirror dompost...this week ca. 18/12/2006. environmental resource consent, resource mgmt act.. cheers......thanks................ don.lotto nz. |
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![]() wrote in message ps.com... Geopelia wrote: don.dise.net.nz wrote in message ups.com... Geopelia wrote: Heliostat: the sun stood still/goes not down 1/2 day?plays havoc with birds ability to nav-grow seasons. No it wasn't me who wrote that bit! Geopelia i accept responsibility, don.lotto. i donot attribute line by line and i snip redundant info. no offense intended. sorry geopelia. apologies. 27.12.06. don. That's fine. Merry Christmas! Geopelia |
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![]() wrote in message ps.com... Geopelia wrote: don.dise.net.nz wrote in message ups.com... i wonder what the translation would be and this subject may appear in the holy bible.. From Wikipedia, the free encyclopedia 2 results for: heliostat View results from: Dictionary | Thesaurus | Encyclopedia | All Reference | the Web Dictionary.com Unabridged (v 1.1) - Cite This Source he·li·o·stat /'hili??stæt/ Pronunciation Key - Show Spelled Pronunciation[hee-lee-uh-stat] Pronunciation Key - Show IPA Pronunciation -noun an instrument consisting of a mirror moved by clockwork, for reflecting the sun's rays in a fixed direction. [Origin: 1740-50; NL heliostata. See helio-, -stat] -Related forms he·li·o·stat·ic, adjective Dictionary.com Unabridged (v 1.1) Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006. American Heritage Dictionary - Cite This Source he·li·o·stat (he'le-?-stat') Pronunciation Key n. An instrument in which a mirror is automatically moved so that it reflects sunlight in a constant direction. It is used with a pyrheliometer to make continuous measurements of solar radiation. Perhaps it was due to some atmospheric condition like that which that causes sundogs. The best known example would be the three suns appearing before the battle of Mortimer's Cross. perhaps photo in dominionpost photog on thurs i think, pub sat 23.12.06?? very nice. It has also been suggested as an explanation for some of Ezekiel's vision. Obviously if the sun really stood still it would be because the Earth had stopped rotating! ????????????my question marks don..?????????????????????????? Geopelia Who added the ??? to my post? me again don. That's the only way ///the sun could really stand still as seen from Earth. my /// don.. It is the Earth's rotation that makes the sun appear/// to move through the sky. The sun wouldn't really be standing still anyway, it is racing around in the galaxy at a fast rate of knots, carrying its planets with it. it is all done with mirrors, i do not understand magician speak!! Viganella Italy mirror dompost...this week ca. 18/12/2006. environmental resource consent, resource mgmt act.. cheers......thanks................ don.lotto nz. Archimedes is said to have burned an enemy fleet with mirrors. A heliostat Death Ray! I don't know how true the story of the destruction is, but the principle is feasible, if the mirrors are large enough and curved. Geopelia .. .. .. .. .. .. .. ... .. .. .. .. .. .. .. ... |
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On Wed, 27 Dec 2006 15:57:20 +1300, Geopelia wrote:
Archimedes is said to have burned an enemy fleet with mirrors. A heliostat Death Ray! I don't know how true the story of the destruction is, but the principle is feasible, if the mirrors are large enough and curved. Geopelia Mythbusters had two goes at this. Big mirrors, lots of small mirrors etc etc. And they replicated the boats that were supposed to have been burnt (triemes?). They couldn't do it, and that was against a stationary target. |
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![]() "Warwick" wrote in message news ![]() On Wed, 27 Dec 2006 15:57:20 +1300, Geopelia wrote: Archimedes is said to have burned an enemy fleet with mirrors. A heliostat Death Ray! I don't know how true the story of the destruction is, but the principle is feasible, if the mirrors are large enough and curved. Geopelia Mythbusters had two goes at this. Big mirrors, lots of small mirrors etc etc. And they replicated the boats that were supposed to have been burnt (triemes?). They couldn't do it, and that was against a stationary target. Triremes? You need something that would concentrate the sun's rays into one spot. A magnifying glass will do it. Perhaps if a big one was combined with a mirror it would work. But did the Greeks have the technology to make glass like that? What were the mirrors they used, polished metal? Lasers bounced off mirrors into one spot should do the job today. Geopelia |
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On Thu, 28 Dec 2006 01:15:38 +1300, Geopelia wrote:
"Warwick" wrote in message news ![]() [15 quoted lines suppressed] Triremes? You need something that would concentrate the sun's rays into one spot. A magnifying glass will do it. Perhaps if a big one was combined with a mirror it would work. But did the Greeks have the technology to make glass like that? What were the mirrors they used, polished metal? Lasers bounced off mirrors into one spot should do the job today. Geopelia The myth was busted really. Forget about many small mirrors (polished shields held by hoplites perhaps) because it became very clear they are impossible to aim collectively. The individuals have no idea where they are pointing because the other countless mirrors create too much 'noise' around the target. Many small mirrors held in a mechanical array that aimed them was tried and that failed too. With bigger mirrors the focal length has to be perfect and it is hard to imagine the enemy sitting quitely at the correct spot long enough to be torched. |
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