{"id":16361,"date":"2021-11-27T20:30:12","date_gmt":"2021-11-27T13:30:12","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=16361"},"modified":"2021-11-27T20:30:13","modified_gmt":"2021-11-27T13:30:13","slug":"vu-tru-lon-co-nao-va-toc-do-gian-no-cua-vu-tru","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/vu-tru-lon-co-nao-va-toc-do-gian-no-cua-vu-tru\/","title":{"rendered":"V\u0169 tr\u1ee5 l\u1edbn c\u1ee1 n\u00e0o, v\u00e0 t\u1ed1c \u0111\u1ed9 gi\u00e3n n\u1edf c\u1ee7a v\u0169 tr\u1ee5?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">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 class=\"wp-block-paragraph\">C\u00e2u h\u1ecfi n\u00e0y bao h\u00e0m r\u1ea5t nhi\u1ec1u c\u00e2u h\u1ecfi kh\u00e1c, nh\u1ea5t l\u00e0 b\u1edfi v\u00ec v\u0169 tr\u1ee5 \u0111\u01b0\u1ee3c gi\u1ea3 \u0111\u1ecbnh l\u00e0 t\u1ea5t c\u1ea3 nh\u1eefng g\u00ec t\u1ed3n t\u1ea1i, n\u00ean ch\u1eafc ch\u1eafn r\u1eb1ng k\u00edch th\u01b0\u1edbc c\u1ee7a n\u00f3 l\u00e0 v\u00f4 h\u1ea1n. Tuy nhi\u00ean, s\u1ebd d\u1ec5 hi\u1ec3u h\u01a1n khi d\u00f9ng t\u1eeb \u201ck\u00edch th\u01b0\u1edbc\u201d c\u1ee7a v\u0169 tr\u1ee5, b\u1edfi v\u00ec n\u00f3 c\u00f3 m\u1ed9t c\u00e1ch gi\u00e3n n\u1edf r\u1ea5t \u0111\u1eb7c bi\u1ec7t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u0169 tr\u1ee5, v\u1edbi k\u00edch th\u01b0\u1edbc v\u00f4 c\u00f9ng l\u1edbn c\u1ee7a m\u00ecnh, xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng kh\u00e1 \u0111\u1ed3ng \u0111\u1ec1u, ngay c\u1ea3 c\u00e1c kh\u1ed1i kh\u1ed5ng l\u1ed3 c\u1ee7a c\u00e1c d\u1ea3i thi\u00ean h\u00e0 d\u01b0\u1eddng nh\u01b0 ch\u1ec9 gi\u1ed1ng m\u1ed9t ch\u1ea5m nh\u1ecf n\u1eb1m m\u1ea5t h\u00fat trong kh\u00f4ng gian s\u00e2u th\u1eb3m. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0, m\u1ed9t ng\u01b0\u1eddi c\u00f3 th\u1ec3 ch\u1ec9 ra r\u1eb1ng khi h\u1ecd nh\u00ecn c\u00e0ng xa v\u00e0o kh\u00f4ng gian th\u00ec c\u00e1c thi\u00ean h\u00e0 xa x\u00f4i trong v\u0169 tr\u1ee5 s\u1ebd c\u00e0ng l\u00f9i xa ch\u00fang ta nhanh h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c t\u1ed5ng k\u1ebft l\u1ea1i trong \u0110\u1ecbnh lu\u1eadt c\u1ee7a Hubble (\u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean theo nh\u00e0 thi\u00ean v\u0103n h\u1ecdc ng\u01b0\u1eddi quan s\u00e1t ph\u00e1t hi\u1ec7n ra trong th\u1eadp ni\u00ean 1920), \u0111\u1ecbnh lu\u1eadt ph\u00e1t bi\u1ec3u r\u1eb1ng \u1edf c\u1ea5p \u0111\u1ed9 v\u0169 tr\u1ee5 th\u1eadt s\u1ef1, m\u1ed9t thi\u00ean h\u00e0 c\u00e1ch ch\u00fang ta R n\u0103m \u00e1nh s\u00e1ng s\u1ebd c\u00f3 v\u1ebb nh\u01b0 ch\u1ea1y xa kh\u1ecfi ch\u00fang ta v\u1edbi v\u1eadn t\u1ed1c V, x\u00e1c \u0111\u1ecbnh b\u1edfi c\u00f4ng th\u1ee9c V = HR, trong \u0111\u00f3 H l\u00e0 \u201ch\u1eb1ng s\u1ed1 Hubble\u201d.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb c\u00f4ng th\u1ee9c n\u00e0y, m\u1ed9t ng\u01b0\u1eddi c\u00f3 th\u1ec3 ngh\u0129 r\u1eb1ng b\u00e1n k\u00ednh c\u1ee7a v\u0169 tr\u1ee5 l\u00e0 kho\u1ea3ng c\u00e1ch m\u00e0 t\u1eeb \u0111\u00f3 v\u1eadt th\u1ec3 c\u00f3 v\u1ebb nh\u01b0 \u0111ang l\u00f9i xa v\u1ecb tr\u00ed c\u1ee7a ch\u00fang ta v\u1edbi v\u1eadn t\u1ed1c \u00e1nh s\u00e1ng, trong tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3 ch\u00fang ta kh\u00f4ng bao gi\u1edd c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y ch\u00fang, v\u00ec c\u00e1c tia s\u00e1ng c\u1ee7a ch\u00fang kh\u00f4ng bao gi\u1edd \u0111\u1ebfn \u0111\u01b0\u1ee3c ch\u1ed7 ch\u00fang ta.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u1ef1c t\u1ebf, m\u1ecdi th\u1ee9 ph\u1ee9c t\u1ea1p h\u01a1n. Th\u1ee9 nh\u1ea5t, h\u1eb1ng s\u1ed1 Hubble kh\u00f4ng ph\u1ea3i l\u00e0 h\u1eb1ng s\u1ed1 th\u1eddi gian. M\u1eb7c d\u00f9 v\u1eady, ch\u00fang ta v\u1eabn c\u00f3 th\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t \u01b0\u1edbc l\u01b0\u1ee3ng s\u01a1 v\u1ec1 b\u00e1n k\u00ednh c\u1ee7a v\u0169 tr\u1ee5 d\u1ef1a tr\u00ean quang ph\u1ed5. \u0110\u1ea7u ti\u00ean ch\u00fang ta c\u1ea7n m\u1ed9t gi\u00e1 tr\u1ecb cho H\u1eb1ng s\u1ed1 Hubble: \u01b0\u1edbc t\u00ednh t\u1ed1t nh\u1ea5t hi\u1ec7n nay l\u00e0 kho\u1ea3ng h\u01a1n 22km\/s tr\u00ean 1 tri\u1ec7u n\u0103m \u00e1nh s\u00e1ng, t\u1ee9c l\u00e0, n\u1ebfu ch\u00fang ta nh\u00ecn v\u00e0o kh\u00f4ng gian xa h\u01a1n m\u1ed9t n\u0103m \u00e1nh s\u00e1ng n\u1eefa th\u00ec c\u00e1c thi\u00ean h\u00e0 s\u1ebd t\u1ecf ra \u0111ang ch\u1ea1y \u0111ua v\u1edbi ch\u00fang ta \u1edf m\u1ed9t v\u1eadn t\u1ed1c \u0111\u01b0\u1ee3c c\u1ed9ng th\u00eam 22km\/s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c1p d\u1ee5ng n\u00f3 v\u00e0o \u0110\u1ecbnh lu\u1eadt Hubble, v\u1edbi V b\u1eb1ng v\u1eadn t\u1ed1c \u00e1nh s\u00e1ng th\u00ec b\u00e1n k\u00ednh c\u1ee7a v\u0169 tr\u1ee5 t\u00ednh ra kho\u1ea3ng 13.600 tri\u1ec7u n\u0103m \u00e1nh s\u00e1ng; c\u00e1c con s\u1ed1 th\u1ef1c th\u00ec l\u1edbn h\u01a1n kho\u1ea3ng ba l\u1ea7n.<\/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 C\u00e2u h\u1ecfi n\u00e0y bao h\u00e0m r\u1ea5t nhi\u1ec1u c\u00e2u h\u1ecfi kh\u00e1c, nh\u1ea5t l\u00e0 b\u1edfi v\u00ec v\u0169 tr\u1ee5 \u0111\u01b0\u1ee3c gi\u1ea3 \u0111\u1ecbnh l\u00e0 t\u1ea5t c\u1ea3 nh\u1eefng g\u00ec t\u1ed3n t\u1ea1i, n\u00ean ch\u1eafc ch\u1eafn r\u1eb1ng k\u00edch th\u01b0\u1edbc c\u1ee7a n\u00f3 l\u00e0 v\u00f4 h\u1ea1n. Tuy nhi\u00ean, [&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-16361","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\/16361","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=16361"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16361\/revisions"}],"predecessor-version":[{"id":16362,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16361\/revisions\/16362"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=16361"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=16361"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=16361"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}