D\u1ea3i Ng\u00e2n H\u00e0<\/a> – n\u01a1i h\u1ed9i t\u1ee5 c\u1ee7a h\u01a1n 100 ngh\u00ecn ng\u00f4i sao, trong \u0111\u00f3 bao g\u1ed3m c\u1ea3 M\u1eb7t Tr\u1eddi c\u1ee7a ch\u00fang ta, c\u00e1c nh\u00e0 thi\u00ean v\u0103n h\u1ecdc \u0111\u00e3 t\u1eadp trung quan s\u00e1t h\u01a1n 2.400 ng\u00f4i sao s\u00e1ng ch\u00f3i nh\u1ea5t c\u1ee7a D\u1ea3i Ng\u00e2n H\u00e0 – c\u00f2n \u0111\u01b0\u1ee3c gi\u1edbi khoa h\u1ecdc g\u1ecdi l\u00e0 bi\u1ebfn quang Cepheid – v\u1edbi K\u00ednh vi\u1ec5n v\u1ecdng V\u00e1csava t\u1ea1i \u0110\u00e0i thi\u00ean v\u0103n Las Campanas tr\u00ean \u0111\u1ec9nh Andes \u1edf Chile.<\/p>\n\n\n\nBi\u1ebfn quang Cepheid l\u00e0 nh\u1eefng thi\u00ean th\u1ec3 c\u00f3 \u0111\u1ed9 s\u00e1ng thay \u0111\u1ed5i theo chu k\u1ef3 \u0111\u1ec1u \u0111\u1eb7n theo th\u1eddi gian. Nh\u1eefng ng\u00f4i sao n\u00e0y \u0111\u1eb7c bi\u1ec7t l\u1edbn v\u00e0 s\u00e1ng g\u1ea5p h\u01a1n M\u1eb7t Tr\u1eddi t\u1eeb 100 – 10.000 l\u1ea7n, theo \u0111\u00f3 ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c quan s\u00e1t th\u1ea5y t\u1eeb kh\u1eafp thi\u00ean h\u00e0, qua c\u00e1c \u0111\u00e1m m\u00e2y kh\u00ed v\u00e0 b\u1ee5i gi\u1eefa c\u00e1c v\u00ec sao.<\/p>\n\n\n\n
\u0110\u1eb7c bi\u1ec7t h\u01a1n n\u1eefa, \u0111\u00e2y l\u00e0 nh\u1eefng ng\u00f4i sao tr\u1ebb – ch\u01b0a \u0111\u1ea7y 400 tri\u1ec7u n\u0103m tu\u1ed5i, do \u0111\u00f3 ch\u00fang v\u1eabn c\u00f2n \u1edf r\u1ea5t g\u1ea7n n\u01a1i ch\u00fang \u0111\u00e3 \u0111\u01b0\u1ee3c sinh ra. <\/p>\n\n\n\n
C\u00e1c nh\u00e0 thi\u00ean v\u0103n h\u1ecdc \u0111\u00e3 t\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch c\u1ee7a ch\u00fang th\u00f4ng qua vi\u1ec7c so s\u00e1nh \u0111\u1ed9 s\u00e1ng th\u1ef1c s\u1ef1 c\u1ee7a ch\u00fang v\u1edbi \u0111\u1ed9 s\u00e1ng c\u1ee7a ch\u00fang \u0111o \u0111\u01b0\u1ee3c t\u1eeb Tr\u00e1i \u0110\u1ea5t, \u0111\u1ed3ng th\u1eddi theo d\u00f5i c\u00e1c xung \u1ed5n \u0111\u1ecbnh t\u1eeb h\u01a1n 2.400 ng\u00f4i sao n\u00e0y v\u00e0 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ee7a ch\u00fang tr\u00ean m\u00f4 h\u00ecnh 3D c\u1ee7a thi\u00ean h\u00e0.<\/p>\n\n\n\n
Tr\u01b0\u1edfng nh\u00f3m nghi\u00ean c\u1ee9u – nh\u00e0 thi\u00ean v\u0103n h\u1ecdc Dorota Skowron thu\u1ed9c tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc V\u00e1csava (Ba Lan) kh\u1eb3ng \u0111\u1ecbnh: “\u0110\u00e2y l\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean ch\u00fang ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c thi\u00ean th\u1ec3 ri\u00eang l\u1ebb \u0111\u1ec3 hi\u1ec3n th\u1ecb \u0111i\u1ec1u n\u00e0y trong kh\u00f4ng gian ba chi\u1ec1u”.<\/p>\n\n\n\n
Nghi\u00ean c\u1ee9u m\u1edbi gi\u00fap ch\u00fang ta nh\u00ecn nh\u1eadn thi\u00ean h\u00e0 theo m\u1ed9t c\u00e1ch ho\u00e0n to\u00e0n m\u1edbi v\u00e0 c\u1ee5 th\u1ec3 h\u01a1n so v\u1edbi s\u1ef1 hi\u1ec3u bi\u1ebft tr\u01b0\u1edbc \u0111\u00e2y v\u1ec1 h\u00ecnh d\u1ea1ng v\u00e0 c\u1ea5u tr\u00fac xo\u1eafn \u1ed1c c\u1ee7a D\u1ea3i Ng\u00e2n H\u00e0 – v\u1ed1n \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean c\u00e1c ph\u00e9p \u0111o gi\u00e1n ti\u1ebfp \u0111\u1ebfn c\u00e1c m\u1ed1c v\u00e0 suy lu\u1eadn thi\u00ean th\u1ec3 d\u1ef1a tr\u00ean c\u00e1c thi\u00ean h\u00e0 kh\u00e1c trong v\u0169 tr\u1ee5 bao la.\/.<\/p>\n","protected":false},"excerpt":{"rendered":"
M\u1ed9t nh\u00f3m nh\u00e0 thi\u00ean v\u0103n h\u1ecdc qu\u1ed1c t\u1ebf \u0111\u00e3 l\u1eadp ra b\u1ea3n \u0111\u1ed3 ba chi\u1ec1u chi ti\u1ebft nh\u1ea5t c\u1ee7a D\u1ea3i Ng\u00e2n H\u00e0, trong \u0111\u00f3 cho th\u1ea5y thi\u00ean h\u00e0 kh\u00f4ng h\u1ec1 ph\u1eb3ng m\u00e0 c\u00f3 h\u00ecnh ch\u1eef S, gi\u1ed1ng nh\u01b0 m\u1ed9t chi\u1ebfc \u0111\u0129a h\u00ecnh sao b\u1ecb b\u1ebb cong. Nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 tr\u00ean t\u1ea1p ch\u00ed Science […]<\/p>\n","protected":false},"author":23,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-28801","post","type-post","status-publish","format-standard","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28801","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=28801"}],"version-history":[{"count":1,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28801\/revisions"}],"predecessor-version":[{"id":28803,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28801\/revisions\/28803"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=28801"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=28801"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=28801"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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