{"id":16329,"date":"2021-11-27T20:28:11","date_gmt":"2021-11-27T13:28:11","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=16329"},"modified":"2021-11-27T20:28:12","modified_gmt":"2021-11-27T13:28:12","slug":"thoi-diem-chinh-xac-cua-mat-troi-moc-va-mat-troi-lan-duoc-xac-dinh-nhu-the-nao","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/thoi-diem-chinh-xac-cua-mat-troi-moc-va-mat-troi-lan-duoc-xac-dinh-nhu-the-nao\/","title":{"rendered":"Th\u1eddi \u0111i\u1ec3m ch\u00ednh x\u00e1c c\u1ee7a m\u1eb7t tr\u1eddi m\u1ecdc v\u00e0 m\u1eb7t tr\u1eddi l\u1eb7n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh nh\u01b0 th\u1ebf n\u00e0o?"},"content":{"rendered":"\n<p>T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 12 &#8211; Arkady Leokum<\/p>\n\n\n\n<p>N\u1ebfu cho r\u1eb1ng thi\u00ean v\u0103n h\u1ecdc l\u00e0 m\u1ed9t khoa h\u1ecdc l\u00e2u \u0111\u1eddi nh\u1ea5t v\u00e0 m\u1eb7t tr\u1eddi m\u1ecdc v\u00e0 l\u1eb7n l\u00e0 nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng thi\u00ean nhi\u00ean h\u1ebft s\u1ee9c c\u0103n b\u1ea3n, c\u00f3 th\u1ec3 b\u1ea1n s\u1ebd ngh\u0129 r\u1eb1ng c\u00e2u h\u1ecfi n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft nhi\u1ec1u th\u1ebf k\u1ef7 tr\u01b0\u1edbc. Ho\u00e0n to\u00e0n kh\u00f4ng ph\u1ea3i v\u1eady. Ch\u00fang ta s\u1ed1ng tr\u00ean m\u1ed9t qu\u1ea3 c\u1ea7u \u0111\u00e1 bao quanh b\u1edfi kh\u00f4ng kh\u00ed, \u0111i\u1ec1u n\u00e0y khi\u1ebfn cho vi\u1ec7c ch\u1ec9 ra ch\u00ednh x\u00e1c th\u1eddi \u0111i\u1ec3m m\u1eb7t tr\u1eddi m\u1ecdc v\u00e0 l\u1eb7n l\u00e0 r\u1ea5t kh\u00f3 kh\u0103n. V\u00ed d\u1ee5, ph\u1ea7n n\u00e0o c\u1ee7a m\u1eb7t tr\u1eddi s\u1ebd h\u00e9 qua \u0111\u01b0\u1eddng ch\u00e2n tr\u1eddi v\u00e0 \u0111\u01b0\u1eddng ch\u00e2n tr\u1eddi n\u00e0o: m\u1ed9t b\u1ec1 m\u1eb7t t\u01b0\u1edfng t\u01b0\u1ee3ng ph\u1eb3ng ho\u00e0n h\u1ea3o hay b\u1ec1 m\u1eb7t c\u00f3 t\u00ednh t\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ee7a \u0111\u1ecba ph\u01b0\u01a1ng nh\u01b0 thung l\u0169ng v\u00e0 n\u00fai? H\u01a1n n\u1eefa, ch\u00fang ta ch\u1ec9 c\u00f3 th\u1ec3 th\u1ea5y m\u1eb7t tr\u1eddi sau khi \u00e1nh s\u00e1ng c\u1ee7a n\u00f3 \u0111i xuy\u00ean qua kh\u00ed quy\u1ec3n tr\u00e1i \u0111\u1ea5t. S\u1ef1 kh\u00fac x\u1ea1 sau \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 m\u1eb7t tr\u1eddi kh\u00f4ng th\u1ef1c s\u1ef1 \u1edf n\u01a1i n\u00f3 c\u00f3 v\u1ebb nh\u01b0 \u0111ang \u0111\u1ee9ng. M\u00e0 hi\u1ec7u \u1ee9ng kh\u00fac x\u1ea1 n\u00e0y l\u1ea1i thay \u0111\u1ed5i theo v\u0129 \u0111\u1ed9 v\u00e0 c\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft.<\/p>\n\n\n\n<p>Nh\u1eefng nh\u00e0 thi\u00ean v\u0103n h\u1ecdc gi\u1ecfi nh\u1ea5t cu\u1ed1i c\u00f9ng \u0111\u00e3 ch\u1ecdn \u0111\u1ecbnh ngh\u0129a m\u1eb7t tr\u1eddi m\u1ecdc v\u00e0 l\u1eb7n l\u00e0 th\u1eddi \u0111i\u1ec3m m\u00e0 t\u00e2m m\u1eb7t tr\u1eddi t\u1ea1o th\u00e0nh m\u1ed9t g\u00f3c 90,83330 v\u1edbi thi\u00ean \u0111\u1ec9nh, t\u1ee9c l\u00e0 \u0111i\u1ec3m n\u1eb1m ngay tr\u00ean \u0111\u1ea7u ng\u01b0\u1eddi quan s\u00e1t. \u0110i\u1ec1u n\u00e0y \u0111\u00e3 lo\u1ea1i tr\u1eeb \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 h\u00f3c b\u00faa trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng ch\u00e2n tr\u1eddi chu\u1ea9n nh\u01b0ng t\u1ea1i sao g\u00f3c \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u00fang 900? Th\u1ee9 nh\u1ea5t, trung b\u00ecnh trong v\u00f2ng m\u1ed9t n\u0103m, m\u1eb7t tr\u1eddi d\u01b0\u1eddng nh\u01b0 che ph\u1ee7 m\u1ed9t v\u00f9ng 0,533330 c\u1ee7a b\u1ea7u tr\u1eddi, v\u1eady n\u00ean kho\u1ea3ng c\u00e1ch gi\u1eefa t\u00e2m m\u1eb7t tr\u1eddi v\u00e0 b\u1edd c\u1ee7a n\u00f3 l\u00e0 kho\u1ea3ng m\u1ed9t n\u1eeda s\u1ed1 \u0111\u00f3, t\u1ee9c l\u00e0 0,266670. Th\u1ee9 hai, kh\u00ed quy\u1ec3n tr\u00e1i \u0111\u1ea5t b\u1ebb cong \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi trung b\u00ecnh kho\u1ea3ng 0,566660 v\u00e0 s\u1ed1 n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c c\u1ed9ng v\u00e0o b\u00e1n k\u00ednh m\u1eb7t tr\u1eddi \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 tr\u00f9ng kh\u1edbp gi\u1eefa b\u1ec1 ngo\u00e0i v\u00e0 th\u1ef1c t\u1ebf, t\u1ea1o n\u00ean con s\u1ed1 cu\u1ed1i c\u00f9ng l\u00e0 0,83330.<\/p>\n\n\n\n<p>Do \u0111\u00f3, vi\u1ec7c x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m m\u1eb7t tr\u1eddi m\u1ecdc v\u00e0 l\u1eb7n n\u00e0y c\u00f3 v\u1ebb nh\u01b0 l\u00e0 m\u1ed9t s\u1ef1 ch\u1ea5p v\u00e1 v\u1ee5ng v\u1ec1, \u0111\u1eb7t c\u01a1 s\u1edf tr\u00ean trung b\u00ecnh n\u0103m v\u00e0 b\u1ecf qua c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111\u1ecba ph\u01b0\u01a1ng. V\u1eady n\u00ean, th\u1eddi \u0111i\u1ec3m m\u1eb7t tr\u1eddi m\u1ecdc v\u00e0 l\u1eb7n kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c d\u1ef1 b\u00e1o ch\u00ednh x\u00e1c cho b\u1ea5t k\u1ef3 \u0111\u1ecba ph\u01b0\u01a1ng n\u00e0o (\u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u00e1c v\u0129 \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed1i cao, n\u01a1i m\u00e0 hi\u1ec7u \u1ee9ng kh\u00fac x\u1ea1 kh\u00e1 m\u1ea1nh) v\u00e0 c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c \u0111\u0103ng tr\u00ean c\u00e1c t\u1edd b\u00e1o c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh sai ch\u1ec9 trong v\u00f2ng m\u1ed9t v\u00e0i ph\u00fat sau khi \u0111\u0103ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 12 &#8211; Arkady Leokum N\u1ebfu cho r\u1eb1ng thi\u00ean v\u0103n h\u1ecdc l\u00e0 m\u1ed9t khoa h\u1ecdc l\u00e2u \u0111\u1eddi nh\u1ea5t v\u00e0 m\u1eb7t tr\u1eddi m\u1ecdc v\u00e0 l\u1eb7n l\u00e0 nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng thi\u00ean nhi\u00ean h\u1ebft s\u1ee9c c\u0103n b\u1ea3n, c\u00f3 th\u1ec3 b\u1ea1n s\u1ebd ngh\u0129 r\u1eb1ng c\u00e2u h\u1ecfi n\u00e0y \u0111\u00e3 [&hellip;]<\/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],"tags":[],"class_list":["post-16329","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16329","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=16329"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16329\/revisions"}],"predecessor-version":[{"id":16330,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16329\/revisions\/16330"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=16329"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=16329"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=16329"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}