T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 12 – Arkady Leokum<\/p>\n\n\n\n
Cho d\u00f9 \u0111\u01b0\u1ee3c nh\u00ecn qua m\u1ed9t k\u00ednh vi\u1ec5n v\u1ecdng m\u1ea1nh nh\u1ea5t, m\u1ecdi ng\u00f4i sao n\u1eb1m xa m\u1eb7t tr\u1eddi tr\u00f4ng ch\u1ec9 gi\u1ed1ng nh\u01b0 n\u00f3 \u0111\u01b0\u1ee3c nh\u00ecn qua m\u1ed9t \u1ed1ng nh\u00f2m \u0111\u1ed3 ch\u01a1i: ch\u1ec9 l\u00e0 m\u1ed9t ch\u1ea5m s\u00e1ng nh\u1ecf. N\u0103m 1868, nh\u00e0 V\u1eadt l\u00fd Armand Fizeau ch\u1ec9 ra r\u1eb1ng b\u1ec1 r\u1ed9ng c\u1ee7a m\u1ed9t ng\u00f4i sao v\u1eabn c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch khai th\u00e1c c\u00e1c \u0111\u1eb7c t\u00ednh s\u00f3ng c\u1ee7a \u00e1nh s\u00e1ng. H\u1ecd s\u1eed d\u1ee5ng m\u1ed9t c\u1eb7p g\u01b0\u01a1ng \u0111\u1ec3 k\u1ebft h\u1ee3p c\u00e1c tia s\u00e1ng \u0111\u1ebfn t\u1eeb m\u00e9p c\u1ee7a ng\u00f4i sao. B\u1eb1ng c\u00e1ch di chuy\u1ec3n c\u1eb7p g\u01b0\u01a1ng sao cho c\u00e1c tia s\u00e1ng giao thoa v\u1edbi nhau s\u1ebd c\u00f3 th\u1ec3 suy ra kho\u1ea3ng c\u00e1ch ban \u0111\u1ea7u gi\u1eefa c\u00e1c tia s\u00e1ng v\u00e0 nh\u1edd \u0111\u00f3 bi\u1ebft \u0111\u01b0\u1ee3c \u0111\u1ed9 l\u1edbn c\u1ee7a ng\u00f4i sao.<\/p>\n\n\n\n
N\u0103m 1920, nh\u00e0 thi\u00ean v\u0103n h\u1ecdc Albert Michelson \u0111\u00e3 l\u00ean trang nh\u1ea5t c\u1ee7a b\u00e1o New York Times sau khi s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p tr\u00ean \u0111\u1ec3 kh\u00e1m ph\u00e1 ra r\u1eb1ng Ng\u00f4i sao \u0111\u1ecf kh\u1ed5ng l\u1ed3 Betelgeuse c\u00f3 chi\u1ec1u ngang kho\u1ea3ng 417 tri\u1ec7u km hay b\u1eb1ng 300 l\u1ea7n \u0111\u01b0\u1eddng k\u00ednh m\u1eb7t tr\u1eddi. Trong nhi\u1ec1u th\u1eadp ni\u00ean, \u0111\u00e2y c\u00f3 v\u1ebb nh\u01b0 l\u00e0 gi\u1edbi h\u1ea1n c\u1ee7a \u201ck\u1ef9 thu\u1eadt giao thoa\u201d nh\u01b0ng trong su\u1ed1t th\u1eadp ni\u00ean 1980 Ti\u1ebfn S\u0129 John Baldwin v\u00e0 c\u00e1c \u0111\u1ed3ng nghi\u1ec7p c\u1ee7a \u00f4ng t\u1ea1i \u0110\u1ea1i h\u1ecdc Cambridge \u0111\u00e3 b\u1eaft \u0111\u1ea7u nghi\u00ean c\u1ee9u c\u00e1c c\u00e1ch th\u1ee9c \u0111\u1ec3 bi\u1ebfn ph\u01b0\u01a1ng ph\u00e1p tr\u00ean th\u00e0nh m\u1ed9t c\u00e1ch \u0111\u1ec3 nh\u00ecn th\u1ea5y d\u1ea1ng tr\u00f2n c\u1ee7a c\u00e1c ng\u00f4i sao. Chi ti\u1ebft c\u1ee7a n\u00f3 r\u1ea5t ph\u1ee9c t\u1ea1p nh\u01b0ng v\u1ec1 b\u1ea3n ch\u1ea5t, c\u00e1c k\u00ednh l\u1ed3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m \u0111\u1ea7y ph\u1ea7n c\u00f2n l\u1ea1i trong h\u00ecnh \u1ea3nh c\u1ee7a ng\u00f4i sao, nh\u1edd \u0111\u00f3 b\u1ed9c l\u1ed9 to\u00e0n b\u1ed9 b\u1ec1 m\u1eb7t ng\u00f4i sao. Th\u00e1ng 9 n\u0103m 1995, nh\u00f3m c\u1ee7a \u00f4ng \u0111\u00e3 thu \u0111\u01b0\u1ee3c h\u00ecnh \u1ea3nh b\u1ec1 m\u1eb7t c\u1ee7a Capella, m\u1ed9t ng\u00f4i sao s\u00e1ng \u1edf ph\u00eda b\u1eafc c\u1ee7a ch\u00f9m sao Ng\u1ef1 Phu (Auriga) v\u00e0 kh\u1eb3ng \u0111\u1ecbnh c\u00e1c b\u1eb1ng ch\u1ee9ng tr\u01b0\u1edbc \u0111\u00e2y r\u1eb1ng sao Capella th\u1ef1c ra l\u00e0 hai ng\u00f4i sao \u0111ang bay xung quanh nhau. T\u1eeb \u0111\u00f3 nh\u00f3m c\u0169ng thu \u0111\u01b0\u1ee3c h\u00ecnh \u1ea3nh c\u1ee7a nhi\u1ec1u ng\u00f4i sao kh\u00e1c, trong \u0111\u00f3 c\u00f3 Betelgeuse.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 12 – Arkady Leokum Cho d\u00f9 \u0111\u01b0\u1ee3c nh\u00ecn qua m\u1ed9t k\u00ednh vi\u1ec5n v\u1ecdng m\u1ea1nh nh\u1ea5t, m\u1ecdi ng\u00f4i sao n\u1eb1m xa m\u1eb7t tr\u1eddi tr\u00f4ng ch\u1ec9 gi\u1ed1ng nh\u01b0 n\u00f3 \u0111\u01b0\u1ee3c nh\u00ecn qua m\u1ed9t \u1ed1ng nh\u00f2m \u0111\u1ed3 ch\u01a1i: ch\u1ec9 l\u00e0 m\u1ed9t ch\u1ea5m s\u00e1ng nh\u1ecf. N\u0103m 1868, […]<\/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-16347","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\/16347","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=16347"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16347\/revisions"}],"predecessor-version":[{"id":16348,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/16347\/revisions\/16348"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=16347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=16347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=16347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}