Ta th\u01b0\u1eddng l\u1ea5y v\u1ecb tr\u00ed M\u1eb7t Tr\u1eddi \u0111i qua tr\u00ean b\u1ea7u tr\u1eddi l\u00e0m ti\u00eau chu\u1ea9n \u0111\u1ec3 t\u00ednh th\u1eddi gian. M\u1ed7i l\u1ea7n M\u1eb7t Tr\u1eddi \u0111i qua \u0111\u01b0\u1eddng t\u00fd – ng\u1ecd tr\u00ean tr\u1eddi l\u00e0 12 h tr\u01b0a c\u1ee7a v\u00f9ng \u0111\u00f3. V\u00ec Tr\u00e1i \u0110\u1ea5t t\u1ef1 quay n\u00ean th\u1eddi \u0111i\u1ec3m nh\u1eefng v\u00f9ng kh\u00e1c nhau tr\u00ean Tr\u00e1i \u0110\u1ea5t nh\u00ecn th\u1ea5y M\u1eb7t Tr\u1eddi \u0111i qua \u0111\u01b0\u1eddng t\u00fd – ng\u1ecd tr\u00ean tr\u1eddi kh\u00e1c nhau. Do \u0111\u00f3 c\u00e1c v\u00f9ng c\u0103n c\u1ee9 ph\u01b0\u01a1ng v\u1ecb c\u1ee7a M\u1eb7t Tr\u1eddi \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u1eddi gian kh\u00f4ng gi\u1ed1ng nhau. Khi London n\u01b0\u1edbc Anh 12 gi\u1edd tr\u01b0a th\u00ec B\u1eafc Kinh l\u00e0 7 gi\u1edd 45 ph\u00fat chi\u1ec1u, Th\u01b0\u1ee3ng H\u1ea3i l\u00e0 8 gi\u1edd 06 ph\u00fat t\u1ed1i.<\/p>\n\n\n\n
Trong \u0111i\u1ec1u ki\u1ec7n khoa h\u1ecdc ph\u00e1t tri\u1ec3n nh\u01b0 ng\u00e0y nay, \u0111i\u1ec1u \u0111\u00f3 r\u1ea5t kh\u00f4ng thu\u1eadn ti\u1ec7n cho s\u1eed d\u1ee5ng. \u0110\u1ec3 thu\u1eadn ti\u1ec7n ng\u01b0\u1eddi ta chia to\u00e0n c\u1ea7u th\u00e0nh 24 m\u00fai gi\u1edd. M\u1ed7i m\u00fai gi\u1edd g\u1ed3m 15 kinh \u0111\u1ed9. V\u1ecb tr\u00ed \u0111\u00e0i thi\u00ean v\u0103n Greenwich c\u1ee7a Anh c\u00f3 m\u00fai gi\u1edd l\u00e0 0, bao g\u1ed3m 7,5o kinh tuy\u1ebfn t\u00e2y \u0111\u1ebfn 7,5o kinh tuy\u1ebfn \u0111\u00f4ng. D\u00e2n c\u01b0 trong v\u00f9ng n\u00e0y \u0111\u1ec1u th\u1ed1ng nh\u1ea5t d\u00f9ng th\u1eddi gian theo \u0111\u00e0i thi\u00ean v\u0103n Greenwich. Ph\u00eda \u0111\u00f4ng m\u00fai gi\u1edd 0 l\u00e0 m\u00fai gi\u1edd th\u1ee9 nh\u1ea5t, g\u1ecdi l\u00e0 m\u00fai \u0111\u00f4ng 1, t\u1eeb 7,5 \u0111\u1ebfn 22,5 \u0111\u1ed9 kinh \u0111\u00f4ng, l\u00e0 m\u00fai gi\u1edd ti\u00eau chu\u1ea9n c\u1ee7a 15 \u0111\u1ed9 kinh \u0111\u00f4ng. \u0110i ti\u1ebfp v\u1ec1 ph\u00eda \u0111\u00f4ng thu\u1eadn theo th\u1ee9 t\u1ef1 l\u00e0 m\u00fai \u0111\u00f4ng 2, m\u00fai \u0111\u00f4ng 3\u2026 m\u00e3i \u0111\u1ebfn m\u00fai \u0111\u00f4ng 12. M\u1ed7i l\u1ea7n v\u01b0\u1ee3t qua m\u1ed9t m\u00fai th\u1eddi gian ch\u00eanh nhau \u0111\u00fang m\u1ed9t gi\u1edd. Th\u1eddi gian trong khu v\u1ef1c c\u00f9ng m\u1ed9t m\u00fai gi\u1edd ch\u00eanh l\u1ec7ch v\u1edbi th\u1eddi gian c\u0103n c\u1ee9 theo M\u1eb7t Tr\u1eddi \u0111\u1ec3 \u0111\u1ecbnh ra kh\u00f4ng nhi\u1ec1u (kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 n\u1eeda gi\u1edd). T\u01b0\u01a1ng t\u1ef1, m\u00fai gi\u1edd \u1edf ph\u00eda t\u00e2y c\u0169ng thu\u1eadn theo m\u00fai t\u00e2y 1, m\u00fai t\u00e2y 2, m\u00fai t\u00e2y 3\u2026 m\u00e3i \u0111\u1ebfn m\u00fai t\u00e2y 12 (m\u00fai t\u00e2y 12 ch\u00ednh l\u00e0 m\u00fai \u0111\u00f4ng 12). D\u00e2n c\u01b0 tr\u00ean to\u00e0n th\u1ebf gi\u1edbi n\u1eb1m trong 24 m\u00fai gi\u1edd, th\u1eddi gian c\u1ee7a m\u00fai gi\u1edd th\u1ed1ng nh\u1ea5t v\u1edbi nhau g\u1ecdi l\u00e0 gi\u1edd \u0111\u1ecba ph\u01b0\u01a1ng. Gi\u1eefa 2 m\u00fai gi\u1edd ch\u1ec9 kh\u00e1c nhau 1 gi\u1edd, c\u00f2n ph\u00fat v\u00e0 gi\u00e2y th\u00ec gi\u1ed1ng nhau.<\/p>\n\n\n\n
Nh\u01b0 v\u1eady s\u1eed d\u1ee5ng r\u1ea5t thu\u1eadn l\u1ee3i.<\/p>\n\n\n\n
Trung Qu\u1ed1c \u1edf ph\u00eda \u0111\u00f4ng \u0111\u00e0i thi\u00ean v\u0103n Greenwich n\u00ean th\u1eddi gian ti\u00eau chu\u1ea9n s\u1eed d\u1ee5ng theo 120o kinh \u0111\u00f4ng, thu\u1ed9c v\u1ec1 m\u00fai \u0111\u00f4ng 8. H\u00e0ng ng\u00e0y \u0111\u00e0i ph\u00e1t thanh B\u1eafc Kinh b\u00e1o gi\u1edd ch\u00ednh l\u00e0 gi\u1edd ti\u00eau chu\u1ea9n c\u1ee7a m\u00fai \u0111\u00f4ng 8. Trong ph\u00e2n chia m\u00fai gi\u1edd c\u00f3 l\u00fac kh\u00f4ng ho\u00e0n to\u00e0n c\u0103n c\u1ee9 theo gi\u1edbi h\u1ea1n kinh \u0111\u1ed9 m\u00e0 ph\u1ea3i chi\u1ebfu c\u1ed1 \u0111\u1ebfn \u0111\u01b0\u1eddng bi\u00ean gi\u1edbi \u0111\u1ea5t n\u01b0\u1edbc \u0111\u1ecba h\u00ecnh, s\u00f4ng ng\u00f2i v\u00e0 c\u00e1c \u0111\u1ea3o, \u0111i\u1ec1u \u0111\u00f3 do m\u1ed7i n\u01b0\u1edbc c\u0103n c\u1ee9 nguy\u00ean t\u1eafc s\u1eed d\u1ee5ng thu\u1eadn ti\u1ec7n c\u1ee7a n\u01b0\u1edbc m\u00ecnh \u0111\u1ec3 quy \u0111\u1ecbnh.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: M\u00fai gi\u1edd; Gi\u1edd \u0111\u1ecba ph\u01b0\u01a1ng<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ta th\u01b0\u1eddng l\u1ea5y v\u1ecb tr\u00ed M\u1eb7t Tr\u1eddi \u0111i qua tr\u00ean b\u1ea7u tr\u1eddi l\u00e0m ti\u00eau chu\u1ea9n \u0111\u1ec3 t\u00ednh th\u1eddi gian. M\u1ed7i l\u1ea7n M\u1eb7t Tr\u1eddi \u0111i qua \u0111\u01b0\u1eddng t\u00fd – ng\u1ecd tr\u00ean tr\u1eddi l\u00e0 12 h tr\u01b0a c\u1ee7a v\u00f9ng \u0111\u00f3. V\u00ec Tr\u00e1i \u0110\u1ea5t t\u1ef1 quay n\u00ean th\u1eddi \u0111i\u1ec3m nh\u1eefng v\u00f9ng kh\u00e1c nhau tr\u00ean Tr\u00e1i \u0110\u1ea5t nh\u00ecn th\u1ea5y […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,7],"tags":[],"class_list":["post-6893","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/6893","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=6893"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/6893\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=6893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=6893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=6893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}