Sao ch\u1ed5i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t lo\u1ea1i thi\u00ean th\u1ec3 \u0111\u01b0\u1ee3c con ng\u01b0\u1eddi ch\u00fa \u00fd nh\u1ea5t tr\u00ean b\u1ea7u tr\u1eddi ban \u0111\u00eam. Tr\u00ean b\u1ea7u tr\u1eddi \u0111\u1ea7y sao v\u00e0 t\u0129nh l\u1eb7ng, sao ch\u1ed5i gi\u1ed1ng nh\u01b0 m\u1ed9t v\u1ecb kh\u00e1ch c\u00f3 h\u00ecnh th\u00f9 k\u1ef3 l\u1ea1 \u0111em l\u1ea1i c\u1ea3m gi\u00e1c th\u1ea7n b\u00ed, \u0111\u1ebfn v\u00e0 \u0111i kh\u00f4ng \u0111\u1ec3 l\u1ea1i d\u1ea5u v\u1ebft.<\/p>\n\n\n\n
Trong v\u00f4 s\u1ed1 sao ch\u1ed5i, ch\u1eafc ch\u1eafn n\u1ed5i ti\u1ebfng nh\u1ea5t l\u00e0 sao ch\u1ed5i Halley. N\u00f3 c\u0169ng l\u00e0 sao ch\u1ed5i l\u1ea7n \u0111\u1ea7u ti\u00ean qu\u1ef9 \u0111\u1ea1o \u0111\u01b0\u1ee3c t\u00ednh ch\u00ednh x\u00e1c v\u00e0 c\u00f3 th\u1ec3 d\u1ef1 ki\u1ebfn \u0111\u01b0\u1ee3c th\u1eddi gian \u0111i v\u1ec1 c\u1ee7a n\u00f3.<\/p>\n\n\n\n
N\u0103m 1682 tr\u00ean b\u1ea7u tr\u1eddi xu\u1ea5t hi\u1ec7n m\u1ed9t sao ch\u1ed5i l\u1edbn \u0111\u1eb7c bi\u1ec7t, h\u00ecnh d\u1ea1ng r\u1ea5t k\u1ef3 l\u1ea1 v\u00e0 \u0111\u1ed9 s\u00e1ng kh\u00e1c th\u01b0\u1eddng. Nh\u00e0 thi\u00ean v\u0103n Halley ng\u01b0\u1eddi Anh c\u00f9ng th\u1eddi v\u1edbi Niut\u01a1n \u0111\u00e3 quan s\u00e1t r\u1ea5t nhi\u1ec1u v\u1ec1 ng\u00f4i sao ch\u1ed5i n\u00e0y. Qua nghi\u00ean c\u1ee9u, \u00f4ng d\u00f9ng \u0111\u1ecbnh lu\u1eadt Khaifule v\u00e0 \u0111\u1ecbnh lu\u1eadt v\u1ea1n v\u1eadt h\u1ea5p d\u1eabn c\u1ee7a Niut\u01a1n \u0111\u1ec3 t\u00ednh qu\u1ef9 \u0111\u1ea1o c\u1ee7a ng\u00f4i sao ch\u1ed5i n\u00e0y. K\u1ebft qu\u1ea3 t\u00ednh to\u00e1n ch\u1ee9ng t\u1ecf: sao ch\u1ed5i n\u00e0y l\u00e0 m\u1ed9t thi\u00ean th\u1ec3 quay quanh M\u1eb7t Tr\u1eddi, qu\u1ef9 \u0111\u1ea1o c\u1ee7a n\u00f3 h\u00ecnh el\u00edp nh\u01b0ng l\u00e0 \u00eal\u00edp r\u1ea5t d\u00e0i v\u00e0 d\u1eb9t. \u0110i\u1ec1u khi\u1ebfn cho \u00f4ng Halley c\u1ea3m th\u1ea5y th\u00edch th\u00fa l\u00e0, \u00f4ng ph\u00e1t hi\u1ec7n chu k\u1ef3 c\u1ee7a ng\u00f4i sao ch\u1ed5i n\u00e0y l\u00e0 76 n\u0103m, t\u1ee9c c\u1ee9 c\u00e1ch 76 n\u0103m n\u00f3 l\u1ea1i tr\u1edf v\u1ec1 m\u1ed9t l\u1ea7n. T\u1eeb trong c\u00e1c t\u01b0 li\u1ec7u l\u1ecbch s\u1eed \u00f4ng c\u00f2n bi\u1ebft \u0111\u01b0\u1ee3c kho\u1ea3ng 76 n\u0103m t\u1ee9c l\u00e0 n\u0103m 1607 c\u0169ng xu\u1ea5t hi\u1ec7n m\u1ed9t ng\u00f4i sao ch\u1ed5i l\u1edbn, ti\u1ebfp t\u1ee5c t\u00ednh l\u00ean 76 n\u0103m n\u1eefa t\u1ee9c n\u0103m 1531 tr\u00ean b\u1ea7u tr\u1eddi c\u0169ng xu\u1ea5t hi\u1ec7n m\u1ed9t ng\u00f4i sao ch\u1ed5i l\u1edbn. Do \u0111\u00f3 \u00f4ng m\u1ea1nh d\u1ea1n d\u1ef1 \u0111o\u00e1n n\u0103m d\u1ef1 \u0111o\u00e1n n\u0103m 1682, th\u00ec ng\u00f4i sao ch\u1ed5i l\u1edbn \u0111\u00e3 xu\u1ea5t hi\u1ec7n n\u0103m 1531 v\u00e0 n\u0103m 1607 s\u1ebd quay tr\u1edf l\u1ea1i. Ti\u1ebfn th\u00eam m\u1ed9t b\u01b0\u1edbc \u00f4ng d\u1ef1 \u0111o\u00e1n: “n\u0103m 1682 s\u1ebd xu\u1ea5t hi\u1ec7n sao ch\u1ed5i l\u1edbn \u0111\u1ebfn kinh ng\u1ea1c, 76 n\u0103m t\u1ee9c l\u00e0 n\u0103m 1758 m\u1ed9t l\u1ea7n n\u1eefa n\u00f3 l\u1ea1i xu\u1ea5t hi\u1ec7n tr\u00ean b\u1ea7u tr\u1eddi”.<\/p>\n\n\n\n
G\u1ea7n cu\u1ed1i n\u0103m 1758 b\u1ea3n th\u00e2n Halley tuy \u0111\u00e3 qua \u0111\u1eddi t\u1eeb l\u00e2u nh\u01b0ng ng\u00f4i sao ch\u1ed5i theo d\u1ef1 \u0111o\u00e1n c\u1ee7a Halley \u0111\u00e3 xu\u1ea5t hi\u1ec7n tr\u00ean b\u1ea7u tr\u1eddi v\u00e0o \u0111\u00eam N\u00f4en.<\/p>\n\n\n\n
L\u1eddi d\u1ef1 \u0111o\u00e1n c\u1ee7a Halley \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng th\u1ef1c, b\u1ed9 m\u1eb7t th\u1ea7n b\u00ed c\u1ee7a sao ch\u1ed5i c\u0169ng \u0111\u01b0\u1ee3c l\u00e0m s\u00e1ng t\u1ecf. T\u1eeb \u0111\u00f3 ng\u01b0\u1eddi ta nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c r\u1eb1ng: h\u00e0nh tinh c\u1ee7a sao ch\u1ed5i tuy v\u00f4 c\u00f9ng ph\u1ee9c t\u1ea1p nh\u01b0ng v\u1eabn c\u00f3 th\u1ec3 c\u0103n c\u1ee9 v\u00e0o c\u00e1c \u0111\u1ecbnh lu\u1eadt khoa h\u1ecdc \u0111\u1ec3 t\u00ednh ra. Vi\u1ec7c l\u00e0m c\u1ee7a Halley \u0111\u00e3 m\u1edf \u0111\u01b0\u1eddng cho nh\u00e2n lo\u1ea1i nh\u1eadn th\u1ee9c v\u1ec1 sao ch\u1ed5i. \u0110\u1ec3 k\u1ef7 ni\u1ec7m c\u1ed1ng hi\u1ebfn to l\u1edbn c\u1ee7a \u00f4ng ng\u01b0\u1eddi ta \u0111\u1eb7t t\u00ean cho ng\u00f4i sao ch\u1ed5i \u0111\u00f3 l\u00e0 sao Ch\u1ed5i Halley.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Sao ch\u1ed5i; Sao ch\u1ed5i Halley.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Sao ch\u1ed5i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t lo\u1ea1i thi\u00ean th\u1ec3 \u0111\u01b0\u1ee3c con ng\u01b0\u1eddi ch\u00fa \u00fd nh\u1ea5t tr\u00ean b\u1ea7u tr\u1eddi ban \u0111\u00eam. Tr\u00ean b\u1ea7u tr\u1eddi \u0111\u1ea7y sao v\u00e0 t\u0129nh l\u1eb7ng, sao ch\u1ed5i gi\u1ed1ng nh\u01b0 m\u1ed9t v\u1ecb kh\u00e1ch c\u00f3 h\u00ecnh th\u00f9 k\u1ef3 l\u1ea1 \u0111em l\u1ea1i c\u1ea3m gi\u00e1c th\u1ea7n b\u00ed, \u0111\u1ebfn v\u00e0 \u0111i kh\u00f4ng \u0111\u1ec3 l\u1ea1i d\u1ea5u […]<\/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-7189","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\/7189","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=7189"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7189\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}